学ぶべき者が、学ぶべき事を、学ぶべき様に学ぶ。 そのために自分がしなければならないこと・できることの覚えと、できたこと・しでかしたことの備忘とを記すつもりで半年過ごしゃ、おいらのことだ、ほれこの通り。(Root-5)
| Version | Date | comments if any |
| 0 | 24 Feb. 1993 | Was born (on NEWS-OS 4.1) |
| 0.60 | 8 Dec. 1994 | alpha test baseline |
| 0.95 | 21 Dec. 1995 | Appeared on fj.sources |
| 1.0 | 25 Dec. 1996 | |
| 1.1 | 13 Aug. 1997 | alpha0 released |
| Dec. 1997 | Got Online Software Award '97 on Linux area | |
| 1.2, 1.3 | 25 Dec. 1998 | 1.2: stable(from 1.1c), 1.3: development version (from 1.1d) |
| 1.4 | 13 Aug. 1999 | stable version (from 1.3) |
| 4 Sep. 1999 | Ruby Workshop held in Tokyo | |
| 23 Sep. 1999 | www.ruby-lang.org opened (official date) | |
| 26 Oct. 1999 | 1st Ruby Book "Object-Oriented Scripting Language Ruby" on sale | |
| 1.6 | 19 Sep. 2000 | stable version |
| 30 Nov. 2000 | Perl/Ruby Conference held in Kyoto |