David Bradley (engineer)

David Bradley (engineer)

David Bradley was one of the twelve engineers who worked on the original IBM PC, developing the computer ROM BIOScode. He is credited by some[who?] for inventing the "Control-Alt-Delete" key combination that was used to reboot the computer.



Bradley did not intend Control-Alt-Delete to be used by end users — it was meant to be used by people writing programs or documentation, so that they could reboot their computers without powering them down. This was useful since after a computer was powered down, it was necessary to wait a few seconds before powering it up again to avoid potential damage to the power supply. Since software developers and technical writers would need to restart a computer many times, this key combination was a big time-saver. Bradley chose this key combination because it is practically impossible to accidentally press this combination of keys on a standard keyboard.[1] However, the key combination was revealed to the public when developers found it useful, and at the 20th anniversary of the IBM PC, while on a panel with Bill Gates, Bradley said "I may have invented it (control-alt-delete), but I think Bill [Gates] made it famous".[2]

According to another account, the man responsible for selecting Control-Alt-Delete was Michael Donald Wise. He selected that combination of keys in 1975 as he built the first true PC, Sphere 1, which predated the IBM PC by six years.[3]

Other accomplishments

Bradley is the author of Assembly Language Programming for the IBM Personal Computer (Simon & Schuster, ISBN 0-13-049171-3, January 1984), also released in French as Assembleur sur IBM PC (Dunod, ISBN 2-225-80695-0), Russian ("Radio" Publishing House, Moscow), and Bulgarian ("Technica" Publishing house, 1989).

Bradley holds seven U.S. patents.

Bradley has been adjunct professor of electrical and computer engineering at Florida Atlantic and at North Carolina State University.

Much of Bradley's career has been at IBM. Bradley began at IBM after receiving a PhD from Purdue in 1975. He worked on the Series/1 system. In 1978 he developed the I/O system for the System/23 Datamaster.

In 1980 Bradley was one of twelve engineers developing the first IBM Personal Computer. Bradley developed the ROM BIOS. That got him promoted to manage the BIOS and diagnostics for the IBM PC XT. In 1983 Bradley formed the Personal Systems Architecture Department. In 1984 he helped manage development of the Personal System 2 Model 30.

In November 1987 Bradley became manager of advanced processor design. His group developed the 486/25 Power Platform and the PS/2 Models 90 and 95. In 1991 he became manager of systems architecture for the Entry Systems Technology group. In 1992 he became the architecture manager for the group that developed a personal computer using the PowerPC RISC microprocessor.[4]

In 1993 he returned to be the manager of architecture in the PC group.

On January 30, 2004, Bradley retired from IBM.


External links

Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • David Bradley — may refer to: David Bradley (plowman) (1811–1899) David Bradley (director) (1920–1997), American director David Bradley (actor) (born 1942), British actor David (Dai) Bradley (born 1953), British actor David Bradley (American actor), star of… …   Wikipedia

  • David Robinson (basketball) — David Robinson No. 50 Center Personal information Date of birth August 6, 1965 (1965 08 06) …   Wikipedia

  • David S. Cunningham, Jr. — David Surmier Cunningham, Jr., or Dave Cunningham, (born June 24, 1935) is a business executive who was elected to the Los Angeles City Council in 1973 to succeed Council Member Tom Bradley, who had been elected mayor that year. He represented… …   Wikipedia

  • David Westerfield — David Alan Westerfield Born February 25, 1952 (1952 02 25) (age 59) U.S. Charge(s) …   Wikipedia

  • David Packard — Born September 7, 1912(1912 09 07) Pueblo, Colorado Died March 26, 1996(1996 03 26) (aged 83) Stanford, California Education Stanford University, BA (1934), MA (1939) …   Wikipedia

  • David Hume Kennerly — (born 1947) in Roseburg, Oregon, won the 1972 Pulitzer Prize for Feature Photography for his portfolio of photographs taken of the Vietnam War, Cambodia, East Pakistani refugees near Calcutta, and the Ali Frazier fight in Madison Square Garden,… …   Wikipedia

  • Bradley University — Coordinates: 40°41′40.1″N 89°36′44.1″W / 40.694472°N 89.61225°W / 40.694472; 89.61225 …   Wikipedia

  • SS Carl D. Bradley — The SS Carl D. Bradley was a self unloading Great Lakes freighter. Built in 1927 by the American Ship Building Company in Lorain, Ohio, the Bradley was owned by the Michigan Limestone division of U.S. Steel, and operated by the Bradley… …   Wikipedia

  • Kelly Johnson (engineer) — Clarence Kelly Johnson Clarence Leonard Kelly Johnson Born February 27, 1910(1910 02 27) Ishpeming, Michigan, USA Died …   Wikipedia

  • Henry David Thoreau — Thoreau redirects here. For other uses, see Thoreau (disambiguation). Henry David Thoreau Maxham daguerreotype of Henry David Thoreau made in 1856 Full name Henry David Thoreau Born July 12, 1817( …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”