<P> The Hip - PC included an Agenda palmtop used as a chording keyboard attached to the belt and a 1.44 megabyte floppy drive . Later versions incorporated additional equipment from Park Engineering . The system debuted at "The Lap and Palmtop Expo" on 16 April 1991 . </P> <P> VuMan 1 was developed as part of a Summer - term course at Carnegie Mellon's Engineering Design Research Center, and was intended for viewing house blueprints . Input was through a three - button unit worn on the belt, and output was through Reflection Tech's Private Eye . The CPU was an 8 MHz 80188 processor with 0.5 MB ROM . </P> <P> In 1993, the Private Eye was used in Thad Starner's wearable, based on Doug Platt's system and built from a kit from Park Enterprises, a Private Eye display on loan from Devon Sean McCullough, and the Twiddler chording keyboard made by Handykey . Many iterations later this system became the MIT "Tin Lizzy" wearable computer design, and Starner went on to become one of the founders of MIT's wearable computing project . 1993 also saw Columbia University's augmented - reality system known as KARMA (Knowledge - based Augmented Reality for Maintenance Assistance). Users would wear a Private Eye display over one eye, giving an overlay effect when the real world was viewed with both eyes open . KARMA would overlay wireframe schematics and maintenance instructions on top of whatever was being repaired . For example, graphical wireframes on top of a laser printer would explain how to change the paper tray . The system used sensors attached to objects in the physical world to determine their locations, and the entire system ran tethered from a desktop computer . </P> <P> In 1994, Edgar Matias and Mike Ruicci of the University of Toronto, debuted a "wrist computer ." Their system presented an alternative approach to the emerging head - up display plus chord keyboard wearable . The system was built from a modified HP 95LX palmtop computer and a Half - QWERTY one - handed keyboard . With the keyboard and display modules strapped to the operator's forearms, text could be entered by bringing the wrists together and typing . The same technology was used by IBM researchers to create the half - keyboard "belt computer . Also in 1994, Mik Lamming and Mike Flynn at Xerox EuroPARC demonstrated the Forget - Me - Not, a wearable device that would record interactions with people and devices and store this information in a database for later query . It interacted via wireless transmitters in rooms and with equipment in the area to remember who was there, who was being talked to on the telephone, and what objects were in the room, allowing queries like "Who came by my office while I was on the phone to Mark?". As with the Toronto system, Forget - Me - Not was not based on a head - mounted display . </P>

A fitness tracker can be classified as a wearable computer