Editing Wearable computer (section)

===1970s===
[[Pocket calculator]]s became mass-market devices in 1970, starting in Japan. [[Programmable calculators]] followed in the late 1970s, being somewhat more general-purpose computers. The HP-01 algebraic [[calculator watch]] by Hewlett-Packard was released in 1977.<ref name="Marion">Andre F. Marion, Edward A. Heinsen, Robert Chin, and Bennie E. Helmso, wrist instrument Opens New Dimension in Personal Information [http://www.hp.com/hpinfo/abouthp/histnfacts/museum/personalsystems/0022/other/0022hpjournal.pdf "Wrist instrument opens new dimension in personal information"], Hewlett-Packard Journal, December 1977. See also [http://www.hp.com/hpinfo/abouthp/histnfacts/museum/personalsystems/0022/index.html HP-01 wrist instrument, 1977].</ref>

A camera-to-tactile vest for the blind, launched by C.C. Collins in 1977, converted images into a 1024-point, ten-inch square [[haptic technology|tactile grid]] on a vest.<ref name="collins">C.C. Collins, L.A. Scadden, and A.B. Alden, "Mobile Studies with a Tactile Imaging Device," ''Fourth Conference on Systems & Devices for the Disabled'', 1–3 June 1977, Seattle WA.</ref>