The 2680A was HP's first laser printer. The 2680A had a print resolution of 180 dots per inch and a top speed of 45 pages per minute. It printed on A/A4-size fanfold paper rather than cut sheet paper. The 2680A took almost five years to develop. It was based on a Canon print engine that had been previewed by HP in 1975. Original HP testing on Canon's prototype showed the print engine to be very unreliable with an MPBF (mean pages between failures) of only 250 pages. The original engine required a complete redesign.