It introduced 'soft fonts', treatments like bold and italic and other features including a parallel ( Centronics) interface. The LaserJet Plus followed in September 1985, priced at US$3,995. Although unsupported by HP, because the Laserjet used the same basic PCL language (PCL Level III) spoken by HP's other printers it was possible to use the Laserjet on HP 3000 multiuser systems.

By using control codes it was possible to change the printed text style using font patterns stored in permanent ROM in the printer. The first LaserJet was a high-speed replacement for text-only daisy wheel impact printers and the noisy dot matrix printers. It was quiet compared to other contemporary printers, hence people could use the telephone while sitting near the HP LaserJet. It was ideal for printing memos, letters, and spreadsheets. The HP LaserJet printer had high print quality, could print horizontally or vertically and produce graphics. Due to the high cost of memory, the first LaserJet only had 128 kilobytes of memory, and a portion of that was reserved for use by the controller. It used an 8 MHz Motorola 68000 processor and could print in a variety of character fonts. It was a 300- dpi, 8 ppm printer that sold for $3,495 with the price reduced to $2,995 in September 1985. HP introduced the first laser printer for IBM PC compatible personal computers in May 1984 at the Computer Dealers' Exhibition ( COMDEX). PostScript Cartridge for LaserJet IIP, IID, III, IIID, etc.

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