00387n a2200157 a 4500 B B 006371 20220201171536.0 005.43 Barstein, Jerene Computers and Information Systems New York Holt Rinchart & Winston 1986 xxi,573(1-6)p. Computer operating system G 0 0 0 0 SGGSCC SGGSCC 2020-09-22 0 005.43 2" ind1=" " ind2=" "> <subfield code="a">005.43 7379 2020-09-22 00:00:00 2020-09-22 BK 6372 6372