| name | type | date isolation | country of isolation | continent of isolation | country of origin | continent of origin | Operating system affected | Developer |
|---|---|---|---|---|---|---|---|---|
| Ontario (computer virus) | 07/1990 | Canada | Americas | Canada | Americas | DOS | ||
| Upering | 22/07/2003 | United States | Americas | United States | Americas | |||
| Acme (computer virus) | 1992 | United States | Americas | DOS | ||||
| Ada (computer virus) | 1991 | Argentina | Americas | DOS | ||||
| AIDS (Trojan horse) | 1989 | United States | Americas | DOS |