Complex sentence: Though it was one of the least expensive computers money could buy, a PDP-1 cost $120,000 in 1962 USD It might be called a hack in the historical sense or in the MIT hack sense.
Split into simpler sentences: Though it was one of the least expensive computers money could buy, a PDP-1 cost $120,000 in 1962 USD. The program has been referred to as a hack, perhaps in the historical sense or in the MIT hack sense.