| Answer | Crossword Clue |
|---|---|
| XTS | Early IBM PCs |
| XTS | Old IBM PCs |
| XTS | Old IBM PC's |
| FIXEDDISKS | They appeared in IBM PCs in 1983 |
| MSDOS | Early IBM PC go-with |
| IBMS | Early PCs |
| XTS | Early PCs |
| IBMS | Some early PCs |
| IBMS | Many early PCs |
| DOS | Program for early PCs |
| IBM | Big name in early PCs |
| MSDOS | Early operating system developed for PCs |
