What does Apogee and 3D Realms mean?

Apogee and 3D Realms meaning in Computer Dictionary

were only available in 1987 Apogee may be the developer of several pc software games also had been the first business to produce a shareware subject. Later in 1994, Apogee produces the organization title 3D Realms, a division entirely dedicated in producing 3D games such as Duke Nukem 3D as well as other 3D games.