Strict Standards: Non-static method AL_HELPER::SetupPaths() should not be called statically in /home/software/public_html/guides/init.php on line 66

Strict Standards: Non-static method AL_CATEGORY::GetCategoryArray() should not be called statically in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 82

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/includes/classes/class.categories.php on line 41

Deprecated: Function eregi() is deprecated in /home/software/public_html/guides/includes/classes/class.article.php on line 273

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/includes/classes/class.article.php on line 332

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

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Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Function eregi() is deprecated in /home/software/public_html/guides/includes/classes/class.blog.php on line 153

Deprecated: Function eregi() is deprecated in /home/software/public_html/guides/includes/classes/class.author.php on line 139

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/includes/classes/class.article.php on line 1038

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/includes/classes/class.article.php on line 1039

Deprecated: Function eregi() is deprecated in /home/software/public_html/guides/includes/classes/class.template.php on line 117

Deprecated: Function ereg_replace() is deprecated in /home/software/public_html/guides/includes/classes/class.template.php on line 243

Deprecated: Function eregi() is deprecated in /home/software/public_html/guides/templates/Bright Light/Panels/PageHeader.php on line 86

Deprecated: Non-static method AL_HELPER::PageLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/PageHeader.php on line 95

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 516

Deprecated: Function eregi() is deprecated in /home/software/public_html/guides/templates/Bright Light/Panels/PageHeader.php on line 86

Deprecated: Non-static method AL_HELPER::PageLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/PageHeader.php on line 95

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 516

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

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Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/RootArticleCategoriesPanel.php on line 77

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/ViewArticlePanel.php on line 732

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::AuthorLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/includes/classes/class.article.php on line 522

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 485

Deprecated: Non-static method AL_HELPER::GetRelativeDate() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/includes/classes/class.article.php on line 515

Deprecated: Non-static method AL_HELPER::ShortDate() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 282

Deprecated: Non-static method AL_HELPER::GetCategoryListCVS() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/ViewArticlePanel.php on line 77

Deprecated: Non-static method AL_HELPER::CategoryLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 302

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 604

Deprecated: Non-static method AL_HELPER::GetRatingBar() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/ViewArticlePanel.php on line 78

Deprecated: Non-static method AL_HELPER::GetGlossaryTerms() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/includes/classes/class.article.php on line 637

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/templates/Bright Light/Panels/ViewArticlePanel.php on line 360

Deprecated: Non-static method AL_HELPER::ContentHasComment() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/ViewArticlePanel.php on line 547

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/ArticleOptionsPanel.php on line 60

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/templates/Bright Light/Panels/ArticleOptionsPanel.php on line 60

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/ArticleOptionsPanel.php on line 63

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/templates/Bright Light/Panels/ArticleOptionsPanel.php on line 63

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/ArticleOptionsPanel.php on line 68

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/templates/Bright Light/Panels/ArticleOptionsPanel.php on line 68

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/ArticleOptionsPanel.php on line 81

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

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Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/PopularArticlesPanel.php on line 98

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/PopularArticlesPanel.php on line 98

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

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Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/PopularArticlesPanel.php on line 98

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::ArticleLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/PopularArticlesPanel.php on line 98

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::_MakeArticleURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 453

Deprecated: Non-static method AL_HELPER::_SwapLetters() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 419

Deprecated: Function eregi_replace() is deprecated in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 421

Deprecated: Non-static method AL_HELPER::AuthorLink() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/templates/Bright Light/Panels/PopularAuthorsPanel.php on line 79

Deprecated: Non-static method AL_HELPER::_MakeURLSafe() should not be called statically, assuming $this from incompatible context in /home/software/public_html/guides/admin/includes/classes/class.helper.php on line 485
What is CD?
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 »  Home  »  Computer Encyclopedia Page 2  »  What is CD?
What is CD?
Published  07/2/2011 | Computer Encyclopedia Page 2 | Unrated
What is CD?
The Compact Disc was the first popular optical storage media. The result of a collaboration between Philips and Sony, its original use was for playback of audio recordings. CDs are available in the following types based on the content they carry: CD A (Audio CD), Video CD (for video), Mixed Mode CD (Containing audio and other data types), Data CD (containing all forms of files), CD—I (CDs containing interactive content), and more. Based on their recording capability, we have CD-ROM (Read-only; all pre-manufactured CDs are of this type); CD-R (recordable once); and CD-RW (read and write many times). The original CD drive could read data at 150 Kilobytes per second, and every subsequent CD drive speed has been rated as a multiple of this speed. The laser used in a CD drive has a wavelength of 780 nanometres. The rated storage capacity is 700 MB.
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