Artificial intelligence
Free to read here, from Project Gutenberg.
The Brain
The metal horde
Lex
The Fourth "R"
Watch (First 25,000 words)
Man in a Sewing Machine
Wake (First 25,000 words)
The programmed people
Perfect Answer
The angry house
Delay in Transit
The Cyberene
Love Among the Robots
After Ixmal
The Upside-Down Captain
The thinking machine
Assignment in the Dawn
The deadly thinkers
Eddie
The Cyber and Justice Holmes