Final answer:
The first fully programmable electronic computer is generally regarded as the Colossus. It was developed by British codebreakers during World War II and played a crucial role in breaking the Nazi Enigma code.
Step-by-step explanation:
The first fully programmable electronic computer is generally regarded as the Colossus. The Colossus computer was developed by British codebreakers during World War II to decipher encrypted messages sent by the German military. It used vacuum tube technology and was capable of performing complex calculations at electronic speed.