Digital Research

Middle Triassic (Wikipedia) In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided in chronostratigraphy. The Middle Triassic spans the time between 247.2 Ma and 237 Ma (million years ago). It is preceded by the Early Triassic Epoch and followed by the Late Triassic Epoch. The Middle Triassic is divided into the Anisian and Ladinian ages or stages.

CP/M and Digital Research Inc. (DRI) Web pages (retrotechnology.com) Many software and hardware companies of the 1980’s and beyond, began as one or two-person companies offering a CP/M-compatible program, or a 8080 or Z80-based hardware product or system. CP/M was the dominant operating system for the 8080 and Z80 based systems of the microcomputer market in the mid-1970’s through well into the 1980’s. Created by Dr. Gary Kildall before 1975 and sold quietly in that year as CP/M version 1.3 for $70 per disk, it became known as IMSAI’s first diskette operating system IMDOS in 1976. Gary Kildall and his wife formed Digital Research Inc. to sell and support the product. A popular release was CP/M 1.4 in 1978, and later as CP/M 2.0 and 2.2 in 1979. It was popular because it was cheap and non-proprietary, and because it included all the software tools and information necessary to move it to any hardware platform with a terminal and a floppy diskette controller. Proprietary or competing Z80/8080 operating systems of the time were often program-compatible with CP/M. Non-Z80 systems sometimes had a “Z80 card” in order to run CP/M.

Digital Research (Wikipedia) Digital Research, Inc. (DR or DRI) was a privately held American software 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. It was the first large software company in the microcomputer world. Digital Research was originally based in Pacific Grove, California, later in Monterey, California.

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