SHRDLU documented in Winograd's 1972 rewritten account

In a later first-person account, Terry Winograd states that his original SHRDLU dissertation was Winograd (1971) and that Winograd (1972) was a rewritten version. The same paper describes SHRDLU as answering questions, carrying out commands, incorporating new facts about its world, and operating in a simulated blocks world.