[The first virus] was no later than 1971. In 1971, … I created a process that (a) checked to … not, created a copy of itself and started … and if so, created a file the size … When users tried to save files, the operating … files. Of course, if they did delete a … [If a system administrator deleted the process, ] the other evil process would create another … The only easy to make the computer work …
Google-1
Google-2
Copyright clearance needed for quotation.