Gary Kildall

KnowledgeSetDorothy KildallComputer Connections: People, Places, and Events in the Evolution of the Personal Computer IndustryDorothy McEwenGary A. KildallGary Arlen KildallPrometheus Light and Sound
Gary Arlen Kildall (May 19, 1942 – July 11, 1994) was an American computer scientist and microcomputer entrepreneur who created the CP/M operating system and founded Digital Research, Inc. (DRI).wikipedia
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CP/M

CP/M-80CP/M operating systemBDOS
Gary Arlen Kildall (May 19, 1942 – July 11, 1994) was an American computer scientist and microcomputer entrepreneur who created the CP/M operating system and founded Digital Research, Inc. (DRI).
CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, (or Control Program/Micro ) is a mass-market operating system created in 1974 for Intel 8080/85-based microcomputers by Gary Kildall of Digital Research, Inc.

Digital Research

DRDigital Research, Inc.Digital Initiatives
Gary Arlen Kildall (May 19, 1942 – July 11, 1994) was an American computer scientist and microcomputer entrepreneur who created the CP/M operating system and founded Digital Research, Inc. (DRI).
Digital Research, Inc. (DR or DRI) was a company created by Gary Kildall to market and develop his CP/M operating system and related 8-bit, 16-bit and 32-bit systems like MP/M, Concurrent DOS, FlexOS, Multiuser DOS, DOS Plus, DR DOS and GEM.

PL/M

PLMPLM systemsPLMX
Intel lent him systems using the 8008 and 8080 processors, and in 1973, he developed the first high-level programming language for microprocessors, called PL/M.
is a high-level language conceived and developed by Gary Kildall in 1973 for Hank Smith at Intel for its microprocessors.

Intel 8080

8080i80808080A
Intel lent him systems using the 8008 and 8080 processors, and in 1973, he developed the first high-level programming language for microprocessors, called PL/M.
It became the engine of the Altair 8800, and subsequent S-100 bus personal computers, until it was replaced by the Z80 in this role, and was the original target CPU for CP/M operating systems developed by Gary Kildall.

Data-flow analysis

data flow analysisflow analysisdata-flow
He published a paper that introduced the theory of data-flow analysis used today in optimizing compilers, and he continued to experiment with microcomputers and the emerging technology of floppy disks.
This general approach was developed by Gary Kildall while teaching at the Naval Postgraduate School.

BIOS

ROM BIOSSystem BIOSBasic Input/Output System
In response, Kildall pioneered the concept of a BIOS, a set of simple programs stored in the computer hardware (ROM or EPROM chip) that enabled CP/M to run on different systems without modification.
The term BIOS (Basic Input/Output System) was created by Gary Kildall and first appeared in the CP/M operating system in 1975, describing the machine-specific part of CP/M loaded during boot time that interfaces directly with the hardware.

Computer Chronicles

The Computer Chronicles
He also co-hosted the PBS TV show The Computer Chronicles.
Gary Kildall served as co-host from 1983 to 1990, providing insights and commentary on products, as well as discussions on the future of the ever-expanding personal computer sphere.

Tom Rolander

Gary had left negotiations to his wife, Dorothy, as he usually did, while he and colleague and developer of MP/M operating system Tom Rolander used Gary's private airplane to deliver software to manufacturer Bill Godbout.
Thomas Alan Rolander is an American entrepreneur, engineer, and developer of the multitasking multiuser operating system MP/M created for microcomputers in 1979 while working as the first employee of Digital Research with Gary Kildall, the "father" of CP/M.

CP/M-86

Personal CP/M-86CP/M-86 1.1S5-DOS
IBM, presided by John R. Opel, approached Digital Research in 1980, at Bill Gates' suggestion, to negotiate the purchase of a forthcoming version of CP/M called CP/M-86 for the IBM PC.
After learning about the deal, Digital Research founder Gary Kildall threatened to sue IBM for infringing DRI's intellectual property, and IBM agreed to offer CP/M-86 as an alternative operating system on the PC to settle the claim.

Monterey, California

MontereyMonterey, CAMonterrey
After receiving his degree, he fulfilled a draft obligation to the United States Navy by teaching at the Naval Postgraduate School (NPS) in Monterey, California.

IMSAI 8080

IMSAI Series Two4 IMSAI 8080sImsai
Digital Research licensed CP/M for the IMSAI 8080, a popular clone of the Altair 8800.
In 1977, IMSAI marketing director Seymour I. Rubinstein paid Gary Kildall $25,000 for the right to run CP/M version 1.3, which eventually evolved into an operating system called IMDOS, on IMSAI 8080 computers.

86-DOS

QDOS86-DOS 0.4286-DOS 1.00
Sams left Gates with the task of finding a usable operating system, and a few weeks later he proposed using the operating system 86-DOS—an independently developed operating system that implemented Kildall's CP/M API—from Seattle Computer Products (SCP).
IBM's representatives visited Digital Research and discussed licensing with Digital Research's licensing representative, Dorothy Kildall (née McEwen), who hesitated to sign IBM's non-disclosure agreement.

Naval Postgraduate School

Navy Postgraduate SchoolU.S. Naval Postgraduate SchoolNaval Post Graduate School
After receiving his degree, he fulfilled a draft obligation to the United States Navy by teaching at the Naval Postgraduate School (NPS) in Monterey, California.

MP/M

Concurrent CP/MConcurrent CP/M-86MP/M-86
Gary had left negotiations to his wife, Dorothy, as he usually did, while he and colleague and developer of MP/M operating system Tom Rolander used Gary's private airplane to deliver software to manufacturer Bill Godbout.

Bill Godbout

CompuproGodboutGodbout Electronics
Gary had left negotiations to his wife, Dorothy, as he usually did, while he and colleague and developer of MP/M operating system Tom Rolander used Gary's private airplane to deliver software to manufacturer Bill Godbout.
Godbout was a keen pilot, and would often fly planes with his friend Gary Kildall.

Scott Kildall

Scott
Scott Kildall is the son of computer innovator Gary Kildall.

Source-to-source compiler

transpilertranspilingXLT86
One of the earliest programs of this kind was Digital Research's XLT86 in 1981, a program written by Gary Kildall, which translated .ASM source code for the Intel 8080 processor into .A86 source code for the Intel 8086.

History of personal computers

microcomputer revolutionpersonal computer revolutionof the personal computer
* History of personal computers
Most ran the CP/M-80 operating system developed by Gary Kildall at Digital Research.

Binary recompiler

binary rewritingbinary recompilationrecompiler
Binary recompilation was introduced by Gary Kildall in the 1980s.

Evergreen Washelli Memorial Park

Evergreen-Washelli Memorial ParkEvergreen-Washelli CemeteryEvergreen Washelli Cemetery
He is buried in Evergreen Washelli Memorial Park in north Seattle.

Academic American Encyclopedia

American academiBarnes & Noble New American EncyclopediaThe Electronic Encyclopedia from Grolier
In early 1985 it was renamed KnowledgeSet and released the first computer encyclopedia in June 1985, a CD-ROM version of Grolier's Academic American Encyclopedia named The Electronic Encyclopedia, later acquired by Banta Corporation.

Pebble Beach, California

Pebble BeachPebble Beach CompanyPebble Beach, CA
He owned a mansion with a panoramic ocean view in Pebble Beach, California, near the headquarters of DRI.

Computer scientist

computer science professioncomputer-scientist
Gary Arlen Kildall (May 19, 1942 – July 11, 1994) was an American computer scientist and microcomputer entrepreneur who created the CP/M operating system and founded Digital Research, Inc. (DRI).

Microcomputer

microcomputersmicrocomputingmicro-computer
Gary Arlen Kildall (May 19, 1942 – July 11, 1994) was an American computer scientist and microcomputer entrepreneur who created the CP/M operating system and founded Digital Research, Inc. (DRI).

Entrepreneurship

entrepreneurFounderentrepreneurs
Gary Arlen Kildall (May 19, 1942 – July 11, 1994) was an American computer scientist and microcomputer entrepreneur who created the CP/M operating system and founded Digital Research, Inc. (DRI).