Computervision, Inc. (CV) was an early pioneer in Computer Aided Design and Manufacturing (CAD/CAM). Computervision was founded in 1969 by Marty Allen and Philippe Villers, and headquartered in Bedford, Massachusetts, United States. Its early products were built on a Data General Nova platform. Starting around 1975, Computervision built its own "CGP" (Computervision Graphics Processor) Nova-compatible 16-bit computers with added instructions optimized for graphics applications and using its own operating system known as Computervision Graphic Operating System (CGOS). In the 1980s, Computervision rewrote their code to operate on Unix-based platforms. Computervision was acquired by Prime Computer in 1988 for $434 million. Prime subsequently adopted the Computervision name. On December 12, 1998 Parametric Technology Corporation acquired Computervision. CADDS product history Computervision's first product, CADDS-1, was aimed at the printed circuit board layout and 2-D drafting markets. CADDS stood for Computervison Automated Design and Drafting System. The CADDS-1 system featured a combination digitizer and plotter mounted on a large drafting table. Integrated circuit layout was added with the CADDS-2 product, which had a dedicated operating system and a 16-bit graphic database. When this proved insufficient resolution for VLSI (very large scale integration), the company developed CADDS-2/VLSI in the late 1970s. CADDS-2/VLSI included a new operating system, a 32-bit database, and user expandability through a dedicated programming language called ICPL (integrated circuit programming language), which was a dialect of BASIC, based on an interpreter licensed from Fairchild Semiconductor. The original CADDS-2 ran on Data General Nova 1200 computers. CADDS-2/VLSI ran on Computervision's own hardware/software which was a modified Data General Nova with a modified version of DG's RDOS operating system. CADDS3 was introduced in the late 1970s on the CGP80 and CGP100 using Tektronix storage tube vector devices as display terminals and graphics tablets with menus for operator input. CADDS3 was written in Fortran and based on software developed by Patrick Hanratty and acquired from S3 Corporation around 1973. In 1975, Computervision introduced an improved database that allowed additional entities and data types to be introduced easily. Other improvements, including a B-spline package and improved refresh performance led to adoption by many large customers, including Boeing, which purchased dozens of systems for the 757/767 aircraft program. Improved 3-D design was added in the early 1980s with the CADDS4 product on the CGP200. This version of CADDS moved display technology from storage tube base displays to raster graphics and introduced the dedicated graphics co-processor board