Wang's 400-Series calculators were Wang's first machines to make exclusive use of Large Scale Integration technology. It is not known at this point if the IC's were custom devices, designed by Wang, and fabricated by an outside IC manufacturer, or if Wang used 'off the shelf' calculator chip/chipsets, and wrapped their own logic around them the provide their functionality. 400-Series calculators were programmable, with 320 steps of learn-mode programming available. Programs may be loaded from the keyboard, or from optional punched or mark-sense card reader peripherals. All machines in the line provided a minimum of 16 memory registers, upon which all four basic math functions could directly or indirectly be peformed. The machines utilize Burroughs Panaplex-style displays. Wang also offered another line of machines with similar design to the 400-series calculators, but lacked the programming features. These machines were designed as the "C" series.

Known Models:
Wang 450 Scientist (Basic Scientific, No Trig)
Wang 452 Advanced Scientist (All features of 450, plus Standard and Hyperbolic Trig)
Wang 462 Stastician (Statistics)
Wang 487 Surveyor (Surveying)

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Wang 452-1 Advanced Scientific Programmable
Image Courtesy Jon Hall