File Compression
In order to save room on a hard drive, many files are compressed before they are stored. Files you use often aren't usually compressed. Other reasons you might compress a file is to send it across a wide-area network or a telephone line. A compressed file is smaller than it's uncompressed counterpart, so it takes less time to transfer it across long distances.
There are several programs used to compress (and to decompress) a computer program. The program we use to compress files in Grand County School District is called PKZIP. The program we use to decompress a file is called PKUNZIP.
When will I need to compress a file?
The average person will probably never need to compress a file. The more we use telecommunications (the Internet), the more we may need to uncompress a file. On the Internet, most files are compressed and will need to be uncompressed before they can be used.
Where do I get a copy of PKZIP and PKUNZIP?
PKZIP and PKUNZIP are both shareware software. That means you can get a copy of them on most networks and many places on the Internet. It costs nothing (or just a small copying fee) to get a copy of PKZIP and PKUNZIP. You may use the program for one month for free; then if you choose to keep using the program after the one-month trial period, you must pay for the program. A form to register and pay for the program will come with your free copy. You have a moral (and perhaps a legal) obligation to register the software if you choose to use it after the trial period.
We have one registered copy of PKZIP and PKUNZIP at each school building. The software is on the network, but there is not a menu item so you can easily use it. It takes a little training, it requires access to the DOS system prompt, and you'll need to understand computer viruses before you can use PKZIP and PKUNZIP.
So if you have a need for one of the compression/decompression programs, contact your building sysop or the district's computer/network technician for assistance.
