Technical Systems Consultants (TSC) was a US software company.

Headquartered first in West Lafayette, Indiana

West Lafayette, Indiana

As of the census of 2010, there were 29,596 people, 12,591 households, and 3,588 families residing in the city. The population density was 5,381.1 people per square mile . The racial makeup of the city was 74.3% White, 17.3% Asian, 2.7% African American, 0.16% Native American, 0.03% Pacific...

 (it was started by Don Kinzer and Dave Shirk, EE graduate students at Purdue University

Purdue University

Purdue University, located in West Lafayette, Indiana, U.S., is the flagship university of the six-campus Purdue University system. Purdue was founded on May 6, 1869, as a land-grant university when the Indiana General Assembly, taking advantage of the Morrill Act, accepted a donation of land and...

) and later (1980) moved to Chapel Hill, North Carolina

Chapel Hill, North Carolina

Chapel Hill is a town in Orange County, North Carolina, United States and the home of the University of North Carolina at Chapel Hill and UNC Health Care...

, it was the foremost supplier of software for SWTPC

SWTPC

The U.S. company SWTPC started in 1964 as DEMCO . It was incorporated in 1967 as Southwest Technical Products Corporation of San Antonio, Texas...

 compatible hardware, as well as many other early makes of personal computers. Their software included operating systems (Flex

FLEX (operating system)

The FLEX single-tasking operating system was developed by Technical Systems Consultants of West Lafayette, Indiana, for the Motorola 6800 in 1976. The original version was for 8" floppy disks and the version for 5.25" floppies was called mini-Flex. It was also later ported to the Motorola 6809;...

, mini-FLEX, FLEX09, and UniFlex

UniFlex

UniFLEX is a Unix-like operating system developed by Technical Systems Consultants for the Motorola 6809 family which allowed multitasking and multiprocessing. It was released for DMA-capable 8" floppy, extended memory addressing hardware , Motorola 6809 based computers. Examples included machines...

) and various languages (several BASIC

BASIC

BASIC is a family of general-purpose, high-level programming languages whose design philosophy emphasizes ease of use - the name is an acronym from Beginner's All-purpose Symbolic Instruction Code....

 variants, FORTRAN

Fortran

Fortran is a general-purpose, procedural, imperative programming language that is especially suited to numeric computation and scientific computing...

, Pascal

Pascal (programming language)

Pascal is an influential imperative and procedural programming language, designed in 1968/9 and published in 1970 by Niklaus Wirth as a small and efficient language intended to encourage good programming practices using structured programming and data structuring.A derivative known as Object Pascal...

, C

C (programming language)

C is a general-purpose computer programming language developed between 1969 and 1973 by Dennis Ritchie at the Bell Telephone Laboratories for use with the Unix operating system....

and assemblers).