Short Story:The Computer Who Wrote to Santa Claus
The Megabyte Drive to Believe in Santa Claus is an early story by Terry Pratchett which appears in the anthology A Blink of the Screen. It concerns a Dawn Age computer (in the unbelievably primitive 1980's) that develops sentience and asks for a Christmas present from Santa Claus. This was later recycled into the episode in Hogfather where [[HEX}} tremblingly avoids Big Red Lever time and gets a teddy bear from the Hogfather.