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If you are new to downloading programs over the Internet, you probably have never heard of file compression. In order to speed up the process of downloading programs, many software publishers compress their programs for transfer over the Internet. All of the downloads posted in the TeAch-nology.com Download Center are in one of three formats:

  1. .exe (PC);
  2. .hqx (Mac);
  3. .zip (Compressed File).

.hqx and .exe files will be ready for installation immediately after they are downloaded, but .zip files must be decompressed with a decompression utility. Here are the most popular, free decompression utilities available.

WinZip- Popular Decompression Utility For PC
License: Shareware Version 9.0
For: Win 95/98/NT/2000/XP Size: 2,310 K
Program's Home Page Publisher: WinZip Computing, Inc.

Over 25 million people use this tool. WinZip is a straightforward, fast, and easy-to-use zipping and unzipping utility that includes built-in support for popular Internet file formats such as TAR, ZIP, UUencode, XXencode, BinHex, MIME, and Unix-compressed files. Older ARC, ARJ, and LZH files are supported via external programs.


License: Freeware Version 2.0.0.1
For: Win 98/Me/NT/2000/XP/2003 Server/Vista Size: 5,700K
Publisher: Mozilla

"Mozilla Firefox is a fast, full-featured Web browser that makes browsing more efficient than ever before. Firefox includes pop-up blocking; a tab-browsing; integrated Google searching; simplified privacy controls that let you cover your tracks more effectively; a streamlined browser window that shows you more of the page than any other browser; and a number of additional features that work with you to help you get the most out of your time online."


Aladdin StuffIt Expander- Popular Decompression Utility For Mac
License: Shareware Version 8.5
For: Mac System 7.1.1+ Size: 11,710 K
Program's Home Page Publisher: Aladdin Systems Inc.

This utility for Macintosh users will decompress just about any file (including StuffIt, Compact Pro, BinHex, and MacBinary files) that you come across while on the major commercial online services, surfing the Internet, or receiving email with compressed files attached.

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