Ever heard of "Offsite Storage"?
Many IT departments do it in real life, why not the company that made Terminators?
Yes so they destroyed the Terminator parts, but what about the data they collected on those parts?
For Pity's sake, the Doctor that was examining it had an old Atari ST system at home with files on the AI parts, what about the other people working on the project? D'oh!
"In order to completely solve a problem, you must make sure that the root of the problem is completely removed! If you leave the root, the problem will come back later to get you." - Norman King