Editing Cray-1 (section)

==Software==
In 1978, the first standard software package for the Cray-1 was released, consisting of three main products:
*[[Cray Operating System]] (COS) (later machines would run [[UNICOS]], Cray's [[Unix|UNIX]] flavor)
*[[Cray Assembly Language]] (CAL)
*[[Cray FORTRAN]] (CFT), the first [[automatic vectorization|automatically vectorizing]] [[Fortran]] compiler

The [[United States Department of Energy]] funded sites from [[Lawrence Livermore National Laboratory]], [[Los Alamos Scientific Laboratory]], [[Sandia National Laboratories]] and the [[National Science Foundation]] [[supercomputer]] centers (for high-energy physics) represented the second largest block with LLL's [[Cray Time Sharing System]] (CTSS). CTSS was written in a dynamic memory Fortran, first named LRLTRAN, which ran on [[CDC 7600]]s, renamed CVC (pronounced "Civic") when vectorization for the Cray-1 was added. Cray Research attempted to support these sites accordingly. These software choices had influences on later [[minisupercomputer]]s, also known as "[[crayettes]]".

NCAR has its own operating system (NCAROS).

The [[National Security Agency]] developed its own operating system (Folklore) and language (IMP with ports of Cray Pascal and C and Fortran 90 later)<ref>{{cite book |title=Frontiers of Supercomputing II|url=https://publishing.cdlib.org/ucpressebooks/view?docId=ft0f59n73z&chunk.id=d0e12308&toc.id=d0e12308&brand=ucpress |access-date=2014-02-08}}</ref>

Libraries started with Cray Research's own offerings and [[Netlib]].

Other operating systems existed, but most languages tended to be Fortran or Fortran-based. [[Bell Labs|Bell Laboratories]], as proof of both portability concept and circuit design, moved the first C compiler to their Cray-1 (non-vectorizing). This act would later give CRI a six-month head start on the [[Cray-2]] Unix port to [[ETA Systems]]' detriment, and [[Lucasfilm]]'s first computer generated test film, ''[[The Adventures of André & Wally B.]]''.

Application software generally tends to be either classified (''e.g.'' nuclear code, cryptanalytic code) or proprietary (''e.g.'' petroleum reservoir modeling). This was because little software was shared between customers and university customers. The few exceptions were climatological and meteorological programs until the NSF responded to the Japanese [[Fifth generation computer|Fifth Generation Computer Systems project]] and created its supercomputer centers. Even then, little code was shared.

Partly because Cray were interested in the publicity, they supported the development of [[Cray Blitz]] which won the fourth (1983) and fifth (1986) [[World Computer Chess Championship]], as well as the 1983 and 1984 [[North American Computer Chess Championship]]. The program, [[Chess (Northwestern University) | Chess]], that dominated in the 1970s ran on Control Data Corporation supercomputers.