There are several frequently asked question (FAQ) pages already on our web site:
It is, and it does! It can be downloaded from the Raspberry Pi Foundation
There are two concurrent strands of RISC OS development, RISC OS 4 and 6 by RISC OS Ltd and RISC OS 5 from Castle Technology Ltd and RISC OS Open Ltd. You might wish to read this wikipedia article which explains the history and some of the differences.
If you can think of some obvious questions that we’ve not answered, drop us an email or add some information here…
Q) Where are the “published checksums” mentioned in the help file of !UnTarBZ2?