RISC OS

==Arthur 0.30-1.20==
===1987-1989===
== RISC OS 2 ==
=== 1989-1991 ===
RISC OS 2 didn't have a logo and used the archimedes one instead.
==RISC OS 3-3.1==
===1991-1994===
RISC OS 3 didn't have a logo and used the acorn one instead
== RISC OS 3.5-3.7/NCOS/RISC OS-NC ==
=== 1994-2000 ===
RISC OS 3.5 still used the acorn logo but has it in better quality due to the switch to 16-bit color depth
the Risc PC technologies logo is also used with it most of the time
Acorn risc os 3.7.png
RISC OS 3.7 icon.png
RISC PC.png
==RISC OS 4-4.42==
===RISC OS 4===
====1999-2001====
RISC OS 4 was the first to have a proper logo.
===RISC OS Select===
==== 2001====
===RISC OS 4+ (Select Issue 1)===
===RISC OS Select Issue 2===
===RISC OS Select Issue 3===
ROSSI3.png|Select 3i2/3i3
ROA.png|Select 3i4 (RISC OS Adjust)
====RISC OS Adjust32 (A9Home)====
===2006-===
This was a 32-bit version of RISC OS 4 customized for the A9Home line of small-form-factor computers.
==RISC OS 5==
===2003-present===
==RISC OS Six==
===2007-2009===
==RISC OS Pi==
===2014-present===
==RISC OS Direct==
===2020-present===
Category:Acorn OS
Category:ARM OS
Category:Software
Category:Operating systems
Category:1987