- BT100

BT100 was an impact 1-pin dot matrix printer produced in Czechoslovakia by TESLA Přelouč around 1989. It did not have ribbon, instead printed on a carbon copy paper. It was also sold built into a tape recorder under the name SP 210 T. External references Some information More information (in Czech) Even more information (in Slovak) [read more...]

- SlotMusic

SlotMusic (styled "slotMusic") is a type of microSD memory card developed by SanDisk preloaded with music in MP3 format. They were first available at Wal-Mart and Best Buy stores in the United States in October 2008. The current selection of songs comes from Universal Music Group, Sony BMG, Warner Music Group and EMI Music. The audio files contain no digital rights management, and are encoded at minimum bitrates of 256 to 320 kbit/s. SlotMusic albums may also include high-quality images and videos in multiple formats. The contents of each microSD card may be altered by the user, enabling them to add or remove files from the SlotMusic card as desired. Another type of card, SlotRadio, has been developed for 2009 and has radiolike controls. SlotRadio has more restrictions on how it works, such as not being able to backtrack to a previous song. [read more...]

- Relativator

The relativator was a pre-calculator era circular slide rule designed to perform calculations of Einstein’s special theory of relativity. It was produced by Atomic Laboratories, Inc. As calculators and computers eclipsed older technologies such as slide rules, the relativator slipped into oblivion. [read more...]

- Tablet personal computer

A tablet personal computer (Tablet PC) is tablet computer having the main characteristics of a personal computer in the tradition of the Microsoft Tablet PC, as a machine operated by an end-user with no intervening computer operator. A portable tablet PC is equipped with a touchscreen as a primary input device and designed to be operated and owned by an individual. The term was made popular as a concept presented by Microsoft in 2001, but tablet PCs now refer to any tablet-sized personal computer, even if it's not using Windows but another PC operating system. Tablets may use virtual keyboards and handwriting recognition for text input through the touchscreen. All tablet personal computers have a wireless adapter for Internet and local network connection. Software applications for tablet PCs include office suites, web browsers, games and a variety of applications. However, since portable computer hardware components usually have lower performance, demanding PC applications may not [read more...]

- 9 track tape

The IBM System/360, released in 1964, introduced what is now generally known as 9 track tape. As with the earlier IBM 7 track format it replaced, the magnetic tape is ½ inch (12.65 mm) wide, but has 8 data tracks and one parity track for a total of 9 parallel tracks. Data is stored as 8-bit characters, spanning the full width of the tape (including the parity bit). Various recording methods are used to place the data on tape, depending on the tape speed and data density, including PE (phase encoding), GCR (group code recording) and NRZI (non-return-to-zero, inverted, sometimes pronounced "nur-zee"). Tapes came in various sizes up to 3,600 feet (1,100 m) in length. The standard size of a byte was effectively set at 8 bits with the S/360 and 9 track tape. For over 30 years the format dominated offline storage and data transfer, but by the end of the 20th century it was obsolete, and the last manufacturer of tapes ceased production in early 2002, with drive production ending the [read more...]

- Liquid crystal display

A liquid crystal display (LCD) is a thin, flat electronic visual display that uses the light modulating properties of liquid crystals (LCs). LCs do not emit light directly. They are used in a wide range of applications, including computer monitors, television, instrument panels, aircraft cockpit displays, signage, etc. They are common in consumer devices such as video players, gaming devices, clocks, watches, calculators, and telephones. LCDs have displaced cathode ray tube (CRT) displays in most applications. They are usually more compact, lightweight, portable, less expensive, more reliable, and easier on the eyes. They are available in a wider range of screen sizes than CRT and plasma displays, and since they do not use phosphors, they cannot suffer image burn-in. LCDs are more energy efficient and offer safer disposal than CRTs. Its low electrical power consumption enables it to be used in battery-powered electronic equipment. It is an electronically-modulated optical device [read more...]

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