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1989-03-04
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ZIP Files - What They are and How to Use Them
ZIPed files are basically normal files that are put together
in one file and compressed in size at the same time. The
reason many files are put together is that they are related
and form a system that would be incomplete if any were missing.
They are compressed to save disk space.
ZIPed files are very popular on bulletin boards because callers
have to download only one file to get all they need and because
the compression reduces transmission time.
For example, you might have:
documentation HELP.DOC 12,000 bytes \ (ZIPing)
main program HELP.COM 35,000 bytes --arced to -> HELP.ZIP 31,000 bytes
sample data HELP.DAT 2,000 bytes /
------
49,000 bytes squeezed to 31,000
After you get an ZIP file, you must "un-ZIP" the files,
which will separate the compononents and un-compress them.
Good decompressors are PKZ090.EXE (by Phil Katz)
The basic format for de-arcing an arced file <arcfile> is
PKUNZIP <ZIP File>
e.g. PKUNZIP HELP to de-arc HELP.ZIP.