RISC OS
Operating system
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RISC OS is a computer operating system originally designed by Acorn Computers Ltd in Cambridge, England. First released in 1987, it was designed to run on the ARM chipset, which Acorn had designed concurrently for use in its new line of Archimedes... Wikipedia
Programming languages: C, C++, Assembly language, and more
Initial release date: 1987
Developer: Acorn Computers, RISC OS Open, and RISCOS Ltd
License: Proprietary software and Apache License
Default user interface: GUI
Latest preview: 5.29
Latest release: : 5.28 / 24 October 2020; 3 years ago; 6.20 / 1 December 2009; 14 years ago;