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ARC.TXT
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1989-01-16
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ARC
File Archive Utility
Version 6.00
Copyright 1985,86,87,88,89 by System Enhancement Associates, Inc.
ALL RIGHTS RESERVED
ARC is used to create and maintain file archives. An archive is a
group of files collected together into one file in such a way that the
individual files may be recovered intact. ARC automatically
compresses the files being archived so that the resulting archive
takes up a minimum amount of space.
When ARC is used to add a file to an archive it analyzes the file to
determine which of three storage methods will result in the greatest
savings. Since one of the three methods involves no compression at
all, the resulting archive entry will never be larger than the
original file.
ARC provides a full range of functions for archive creation and
maintenance. ARC also provides password encryption to protect your
data from unauthorized use.
While the exact degree of compression achieved will vary depending on
the contents of any given file, typical compression rates are as
follows:
Programs (.EXE and .COM) files 20% to 30%
ASCII text and documents 50% to 60%
Spreadsheets 50% to 90%
ARC calculates a cyclical redundancy check (CRC) on every file it puts
in an archive and recalculates it whenever a file is extracted. This
helps to ensure data integrity when archives are transmitted over
telephone lines.
A program disk with printed documentation is available for $50 from:
System Enhancement Associates, Inc.
21 New Street, Wayne NJ 07470
or by phone at (201) 473-5153 (Visa and MasterCard accepted). If ARC
is obtained by other means, then it may not be used in a commercial
environment or a governmental organization without payment of a $35
license fee. Site licenses and commercial distribution licenses are
available. Full program sources are available.