Before “Logic Pro X”, “Logic Pro” and “Logic” there was “Notator Logic”.
That was in 1993, when Gerhard Lengeling and Chris Adam left C-Lab to form Emagic (which was acquired by Apple in 2002) bringing with them their MIDI sequencer program “Notator SL” of Atari ST fame, which they rewrote to change it from a pattern based to an hybrid pattern/track based sequencer and to make it multiplatform (Atari ST, Mac, Windows).
The offspring of this effort was “Notator Logic” whose lovely retro logo is faithfully reproduced on this exquisite t-shirt.