Conversation so far:
Who was Mirage Comics?
In the original Mirage Comics storyline for Teenage Mutant Ninja Turtles, April O'Neil was a skilled computer programmer.
What year did Teenage Mutant Turtles some out?
CANNOTANSWER.
Did Mirage Comics make any other comics?
CANNOTANSWER.

Question: How many series did they make?
Self-contained rewrite: How many series did Mirage Comics make?