The asc file extension is associated with the ASCII text files.

ASCII is an acronym for American Standard Code for Information.

An asc file usually contain text data in ASCII code

The extension of an ASC file is the .ASC File

File Extensions in Windows

File Extension File Type

.AIFF or .AIF Audio Interchange File Format

.AU Basic Audio

.AVI Multimedia Audio/Video

.BAT PC batch file

.BMP Windows BitMap

.CLASS or .JAVA Java files

.CSV Comma separated, variable length file (Open in Excel)

.CVS Canvas

.DBF dbase II, III, IV data

.DIF Data Interchange format

.DOC or .DOCX Microsoft Word for Windows/Word97

.EPS Encapsulated PostScript

.EXE PC Application

.FM3 Filemaker Pro databases (the numbers following represent the version #)

.GIF Graphics Interchange Format

.HQX Macintosh BinHex

.HTM or .HTML Web page source text

.JPG or JPEG JPEG graphic

.MAC MacPaint

.MAP Web page imagemap

.MDB MS Access database

.MID or .MIDI MIDI sound