 Boeing 717 was the company designation for the C-135 Stratolifter and KC-135 Stratotanker derivatives of the 367-80.The designation was later reused in renaming the McDonnell Douglas MD-95 to Boeing 717 after the company was merged with Boeing.Boeing's customer codes used to identify specific options and livery specified by customers was started with the 707, and has been maintained through all Boeing's models.