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A DOS file name is composed of two parts: a name, which can be up to eight characters long, and an optional extension, which can be up to three characters long. The name and extension are separated by a period.
In general, DOS filenames use only letters and numerals. Upper and lower case letters are considered identical. In addition, the following symbols can be used in file names:
The following file names are valid:
RESULTS.TXT
SEARCH.1
READ.ME
MY.DOC
A.A
A
{
The following file names are invalid:
MYRESULTS.TXT (MYRESULTS is 9 characters--maximum is 8)
SEARCH.RESULTS (RESULTS is 7 characters--maximum is 3)
ONE.TWO.3 (The period can only be used to separate the
name from the extension)
/.\ (Only the punctuation symbols above can be
used in file names)
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englib@u.washington.edu
Last modified: Wednesday December 19, 2001