00600nam a2200181 a 4500 20191206005703.0 090331s19uu xx 00 eng d Lowe, Doug The least you need to know about DOS / Doug Lowe. 2nd ed Fresno, CA : Mike Murach, c1993. x, 296 p. : ill. Includes appendix and index. Operating systems (Computers) PC-DOS (Computer file) MS-DOS (Computer file) OLOPSC 50063 50063