RISC OS

(operating system)(Reduced Instruction Set Computer OperatingSystem) The operating system originally developed by Acorn Computers for their Archimedes family of personal computers.

RISC OS replaced the Arthur operating system used on thefirst Archimedeses.

It is written in ARM assembly code and distributed onROM so it takes up no disk space and takes no time to load.It supports cooperative multitasking with memory managementand includes a graphical user interface or "WIMP". It iswritten in a highly modular style and makes extensive use ofvectors so it is easy to modify and extend by loading newmodules in RAM. Many system calls (called "SWIs" -software interrupts) are available to application programmersand some of these are available as user comands via a built-incommand-line interpreter. RISC OS also supported outline fonts when only bitmap fonts were available on most otherplatforms.

Following the virtual demise of Acorn, development of RISC OS4 was taken over by RISCOS Ltd on 1999-03-05 and released on1999-07-01.

Latest version: 4.39, as of 2004-09-21.

单词	risc os
释义	RISC OS RISC OS (operating system)(Reduced Instruction Set Computer OperatingSystem) The operating system originally developed by Acorn Computers for their Archimedes family of personal computers. RISC OS replaced the Arthur operating system used on thefirst Archimedeses. It is written in ARM assembly code and distributed onROM so it takes up no disk space and takes no time to load.It supports cooperative multitasking with memory managementand includes a graphical user interface or "WIMP". It iswritten in a highly modular style and makes extensive use ofvectors so it is easy to modify and extend by loading newmodules in RAM. Many system calls (called "SWIs" -software interrupts) are available to application programmersand some of these are available as user comands via a built-incommand-line interpreter. RISC OS also supported outline fonts when only bitmap fonts were available on most otherplatforms. Following the virtual demise of Acorn, development of RISC OS4 was taken over by RISCOS Ltd on 1999-03-05 and released on1999-07-01. Latest version: 4.39, as of 2004-09-21. AcronymsSeeRONWUG
随便看	periodontal file periodontal flap periodontal glomus periodontal health specialists periodontal index periodontal indices periodontal inflammation periodontal knife periodontal ligament periodontal ligament blood vessels periodontal ligament fibers periodontal ligament injection periodontal ligament necrosis periodontal ligament nerve periodontal ligament space periodontal, local factors of disease periodontally periodontal maintenance periodontal, maintenance phase therapy periodontal membrane periodontal membrane fiber periodontal ostectomy periodontal pack periodontal pain periodontal pocket