The Z4 Computer was one of the earliest programmable digital computers, developed by German engineer Konrad Zuse in 1945. It was a significant advancement in computing technology, using electromechanical relays to perform calculations. The Z4 could execute complex mathematical operations and was primarily used for scientific and engineering applications. The Z4 was notable for its ability to be programmed using punched tape, allowing users to input instructions easily. It was later installed at the ETH Zurich in Switzerland, where it contributed to various research projects. The Z4's design laid the groundwork for future developments in computer science and engineering.