The lunar computer known as "Mike" was a vital component of the Apollo 11 mission, which successfully landed humans on the Moon in 1969. Mike was part of the Apollo Guidance Computer (AGC) and played a crucial role in navigation and control during the lunar landing. It was designed to handle complex calculations and ensure the spacecraft's safe descent and ascent. Mike operated with a limited amount of memory and processing power compared to modern computers. Despite these constraints, it was instrumental in executing the mission's critical tasks, demonstrating the ingenuity of NASA engineers and paving the way for future space exploration.