RAR for MS DOS是一款在微软MS DOS环境使用的压缩软件。RAR的优点是压缩率大，速度快当设置成最快压缩方式的时候，压缩包比.ZIP小，而速度却与PKZIP不相上下，更可支持非RAR压缩文件。

RAR for MS DOS更新日志

Version 3.93

1. Bugs fixed:

a) in RAR 3.92 -xd:pathdir switch could also exclude directories,

 which path does not match the path specified in the switch

 and only the directory name is the same as specified;

b) switches -y -or did not work correctly together. Switch -or was

 ignored in presence of -y.

Version 3.92

1. In RAR 3.91 -x switch could also exclude directories

 from archiving even if mask contained wilcard characters and did not

 contain a path. For example, -x*. excluded all those directories,

 which do not have the extension in the name. Now -x switch uses

 RAR 3.80 approach for masks without path, excluding directories

 only if mask does not contain wildcards and matches the directory

 name exactly

2. If file matched two different masks in RarFiles.lst, 

 RAR could select the last match. Normally, if neither of masks

 is a subset of another, the first match must be chosen.