That's simply called "artificial satellite" or just "satellite". Artificial is used to distinguish man made satellites from earths natural satellite, the moon. The space lab is an artificial satellite. GPS satellites are artificial. There are also many communications satellites.
An artificial satellite is a man-made object injected into orbit around another object (The Space Station is an artificial satellite of the Earth). A natural satellite is a "natural" object that orbits around another object (The Moon is a natural satellite of the Earth).
The only artificial satellite launch to take place in 1975 was in India. This satellite was called Aryabhata. Sputnik was the very first artificial satellite to be released, it took place on October 3, 1957.