The Boeing 376 is a communications satellite bus introduced in 1978 by Hughes Space and Communications Company. It was a spin-stabilized bus, a successor to Hughes HS-333.
HS-376 in launch configuration, on a space shuttle, with its antenna closed and lower solar panel retracted
The Boeing 601 is a retired communications satellite bus designed in 1985 and introduced in 1987 by Hughes Space and Communications Company. The series was extremely popular in the 1990s, with more th
TDRS-M, the last satellite based on the Boeing-601