Samuel J Leffler is a

computer scientist A computer scientist is a person who is trained in the academic study of computer science. Computer scientists typically work on the theoretical side of computation, as opposed to the hardware side on which computer engineers mainly focus (al ...

, known for his extensive work on

BSD The Berkeley Software Distribution or Berkeley Standard Distribution (BSD) is a discontinued operating system based on Research Unix, developed and distributed by the Computer Systems Research Group (CSRG) at the University of California, Berk ...

, from the 1980s to

FreeBSD FreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD), which was based on Research Unix. The first version of FreeBSD was released in 1993. In 2005, FreeBSD was the most popular ...

in the present day. Among other projects, he created FlexFAX,

LibTIFF LibTIFF is a library for reading and writing Tagged Image File Format (abbreviated TIFF) files. The set also contains command line tools for processing TIFFs. It is distributed in source code and can be found as binary builds for all kinds of pla ...

, and the FreeBSD Wireless Device Drivers. The ''Design and Implementation'' series of books, which he co-authored, While working for the

Computer Systems Research Group The Computer Systems Research Group (CSRG) was a research group at the University of California, Berkeley that was dedicated to enhancing AT&T Unix operating system and funded by Defense Advanced Research Projects Agency. History Professor Bo ...

(CSRG, UC Berkeley) at

University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant u ...

, Leffler helped with 4.1 and 4.2

release. He has contributed to almost every aspect of BSD systems, including the networking subsystem. After leaving

, Mr. Leffler also worked at

Lucasfilm Lucasfilm Ltd. LLC is an American film and television production company and a subsidiary of Walt Disney Studios, which is a business segment of The Walt Disney Company. The studio is best known for creating and producing the ''Star Wars'' and ' ...

Pixar Animation Studios Pixar Animation Studios (commonly known as Pixar () and stylized as P I X A R) is an American computer animation studio known for its critically and commercially successful computer animated feature films. It is based in Emeryville, Californi ...

Silicon Graphics Silicon Graphics, Inc. (stylized as SiliconGraphics before 1999, later rebranded SGI, historically known as Silicon Graphics Computer Systems or SGCS) was an American high-performance computing manufacturer, producing computer hardware and soft ...

Alias Research Alias may refer to: * Pseudonym * Pen name * Nickname Arts and entertainment Film and television * ''Alias'' (2013 film), a 2013 Canadian documentary film * ''Alias'' (TV series), an American action thriller series 2001–2006 * ''Alias the ...

Softimage 3D Softimage, 3D was a high-end 3D graphics application developed by Softimage, Co., which was used predominantly in the film, broadcasting, gaming, and advertising industries for the production of 3D animation. It was superseded by Softimage XSI i ...

, Cinetron Computer Systems and

VMware VMware, Inc. is an American cloud computing and virtualization technology company with headquarters in Palo Alto, California. VMware was the first commercially successful company to virtualize the x86 architecture. VMware's desktop software ru ...

. Later he became an independent consultant on system design.

Computer Animation Rendering

*'' André and Wally B.'' (1984) texturing/matteing *''

Luxo Jr. ''Luxo Jr.'' is a 1986 American computer-animated short film produced and released by Pixar. Written and directed by John Lasseter, the two-minute short film revolves around one larger and one smaller desk lamp. The larger lamp, named Luxo Sr. ...

'' (1986) rendering *''

Tin Toy ''Tin Toy'' is a 1988 American computer-animated short film produced by Pixar and directed by John Lasseter. The short film, which runs five minutes, stars Tinny, a tin one-man band toy, attempting to escape from Billy, an infant. The third sho ...

'' (1988) renderman team *''

Toy Story ''Toy Story'' is a 1995 American computer-animated comedy film directed by John Lasseter (in his feature directorial debut), produced by Pixar Animation Studios and released by Walt Disney Pictures. The first installment in the '' Toy Story ...

'' (1995) modeling & animation system development/Renderman software development

References

Bibliography

* S. Leffler, M. McKusick, M. Karels, J. Quarterman: ''The Design and Implementation of the 4.3BSD UNIX Operating System'', Addison-Wesley, January 1989, . German translation published June 1990, . Japanese translation published June 1991, (out of print). * S. Leffler, M. McKusick: ''The Design and Implementation of the 4.3BSD UNIX Operating System Answer Book'', Addison-Wesley, April 1991, . Japanese translation published January 1992,

External links

Interview: Sam Leffler of the FreeBSD Foundation
{{DEFAULTSORT:Leffler, Samuel J BSD people American computer scientists Free software programmers FreeBSD people Living people Lucasfilm people Year of birth missing (living people)