. "1993-03-30Z"^^ . . "6e+07"^^ . . . . "2.36e+08"^^ . "6.2e+07"^^ . . "Microsoft Anti-Virus"@en . "Discontinued" . "Microsoft Anti-Virus (MSAV) was an antivirus program introduced by Microsoft for its MS-DOS operating system. The program first appeared in MS-DOS version 6.0(1993 )and last appeared in MS-DOS 6.22. The first version of the antivirus program was basic, had no inbuilt update facility (updates had to be obtained from a BBS and manually installed by the user), and could scan for 1,234 different viruses."@en . . .