T-Square (software)

T-Square is an early drafting program written by Peter Samson assisted by Alan Kotok and possibly Robert A. Saunders while they were students at the Massachusetts Institute of Technology and members of the Tech Model Railroad Club.

[4] T-Square is a small part of the reason people use today's computers for drafting, architecture, drawing and illustration and engineering.

Prior to this revolution and in some places to this day, draftsmen and women used triangles, wood or metal T-squares, pencils and technical pens on film and paper.

[5] In his 1963 MIT Ph.D. thesis, Sutherland explains he completed an early version that could draw parallel and perpendicular lines in November 1961.

He goes on to say, "Somewhat before my first effort was working, Welden Clark of Bolt, Beranek and Newman..." showed him a "similar program" running on a PDP-1.