Charles Babbage, sometimes referred to as the "father of computing".

Family of real-time, process-based, multitasking, multi-user operating systems, developed in the 1980s, originally by Microware Systems Corporation for the Motorola 6809 microprocessor.

- OS-9

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TRS-80 Color Computer

Line of home computers developed and sold by Tandy Corporation.

Final production 64K model (26-3127B)
16K TRS-80 Color Computer
TRS-80 VideoTex Terminal, c. 1980
128K model 26-3334
4K TRS-80 Color Computer from 1981 (model 26-3001)
16K TRS-80 Color Computer
CoCo 3 with Multi-Pak interface and dual floppy drives
CoCo 2 power-on screen
Sample MC6847 VDG character set display
Orange artifact color generated with the white and black colorset
6847T1 VDG in true lowercase mode

Variants of the OS-9 multitasking operating system were available from third parties.


Microware was a US corporation based in Clive, Iowa that produced the OS-9 real-time operating system.


Digital optical disc data storage format that was mostly developed and marketed by Dutch company Philips.

Philips CDI 910, the first consumer-oriented CD-i player, pictured with its "Touchpad" game controller
Sony CD-i Intelligent Discman IVO
Philips CDI 910, the first consumer-oriented CD-i player, pictured with its "Touchpad" game controller
A Philips CDI 210 playing a standard Compact Disc.
Back of a Philips CDI 210 (PAL) player
The CD-i Mouse, most commonly used for professional software
CD-i "Commander" remote control, with an opened sliding cover that reveals buttons for playing audio CDs
The CD-i "Roller" controller, specially designed for kids
E-mail screen of CD-Online UK
The Philips CD-i 450 console at the Computer and Video Game Console Museum of Helsinki in 2012.
The Philips CDI 220
Magnavox CDI 550 (NTSC) with its paddle controller. The CD-i's controllers were heavily criticized.
Philips CDI 450

The Green Book specification also defines a whole hardware set built around the Motorola 68000 microprocessor family, and an operating system called CD-RTOS based on OS-9, a product of Microware.

Motorola 6809

8-bit microprocessor with some 16-bit features.

Die of Motorola 6809
TRS-80 Color Computer
SuperPET SP9000
Vectrex home video game console
6809 programming model, showing the processor registers

However, the decisions made by the design team enabled multi-user, multitasking operating systems like OS-9 and UniFlex.


Home computer created by Sharp Corporation.

Main processor board of original 1987 CZ-600C model
Video board of original 1987 CZ-600C model
Cynthia sprite chip in the original 1987 CZ-600C model
VSOP Video processing chip in the original 1987 CZ-600C model

Other operating systems available include NetBSD for X68030 and OS-9.


Home computer created by Fujitsu.

Operating system: OS-9, (compatible with Color Computer)


Reduced instruction set computer (RISC) instruction set architecture (ISA) created by the 1991 Apple–IBM–Motorola alliance, known as AIM.

IBM PowerPC 601 microprocessor
A schematic showing the evolution of the different POWER, PowerPC and Power ISAs
IBM PowerPC 604e 200 MHz
Custom PowerPC CPU from the Nintendo Wii video game console
The Freescale XPC855T Service Processor of a Sun SunFire V20z

Microware OS-9

Dragon 32/64

The Dragon 32 and Dragon 64 are home computers that were built in the 1980s.

A Dragon 32 home computer
Left and right side of the Dragon 64
Back of the Dragon 32
Top of the Dragon 200-E
Dragon 200 box
Dragon logo
Manic Miner (Software Projects) had to run in black and white.

In addition to the DragonDOS disk operating system, the Dragon 32/64 is capable of running several others, including FLEX, and even OS-9 which brought UNIX-like multitasking to the platform.


Family of text editors that are characterized by their extensibility.

Org-mode, Magit, and Dired buffers in GNU Emacs
Emacs was started by Guy L. Steele Jr. as a project to unify the many divergent TECO command sets and key bindings at MIT
David A. Moon
Emacs' interface was influenced by the design of the space-cadet keyboard, which sought to enable users to type as many different kinds of input as possible.
James Gosling wrote the first Emacs-like editor to run on Unix (Gosling Emacs) in 1981
GNU Emacs running in a text console
GNU Emacs running on Microsoft Windows
XEmacs 21.5 on Linux
uEmacs/Pk 4.0.15 on Linux
The mg tiny Emacs-like editor in OpenBSD 5.3. Editing Ruby source code
JOVE running in a Debian box
Zmacs, an Emacs for Lisp machines

umacs, an implementation under OS-9


Command-line utility for searching plain-text data sets for lines that match a regular expression.

Example of  command

was originally developed for the Unix operating system, but later available for all Unix-like systems and some others such as OS-9.