| 2023-11-09 10:21:19 | menace | Updated Sir Gawain's membership of Horizon: set as current member |
| 2023-11-09 10:21:14 | menace | Added Sir Gawain as a member of Horizon |
| 2023-11-09 10:19:57 | menace | Updated Gaston's membership of Horizon: set as current member |
| 2023-07-09 07:22:59 | menace | Added Levithan as a member of Horizon |
| 2023-04-15 22:45:52 | dipswitch | Added Horizon as organiser of Horizon Easter Party 1990 |
| 2023-04-15 22:44:52 | dipswitch | Added Horizon as organiser of Swedish Elite Easter Conference 1990 |
| 2022-06-17 07:03:08 | menace | Added SMC as a member of Horizon |
| 2022-04-07 19:44:59 | menace | Added BBS The Holy Grail as HQ for Horizon |
| 2021-05-17 09:34:11 | menace | Added Horizon as organiser of Helloween Party 1988 |
| 2021-01-17 16:07:08 | dipswitch | Added Horizon as organiser of The Computer Crossroads 1993 |
| 2021-01-13 03:57:31 | dipswitch | Added Horizon as organiser of Equinoxe and Horizon Party 1989 |
| 2021-01-13 02:52:25 | dipswitch | Added Horizon as organiser of Horizon & Heptagon Meeting 1988 |
| 2021-01-13 02:31:36 | dipswitch | Added Horizon as organiser of Horizon & Jetspeed Meeting 1988 |
| 2021-01-08 04:21:33 | menace | Added The Cook as a member of Horizon |
| 2021-01-07 01:20:55 | dipswitch | Added Natas as a member of Horizon |
| 2020-07-05 11:30:52 | menace | Added Zion as a member of Horizon |
| 2019-10-22 18:30:38 | ltk_tscc | Edited nick 'Horizon': changed abbreviation to 'HZ' |
| 2019-10-22 18:20:21 | ltk_tscc | Added link https://www.pouet.net/groups.php?which=625 |
| 2019-02-03 14:52:52 | 100bit | Added link http://csdb.dk/group/?id=2315 |
| 2019-02-03 14:52:02 | 100bit | Added link http://janeway.exotica.org.uk/author.php?id=61811 |
| 2018-12-30 17:55:52 | menace | Edited notes |
| 2018-12-27 13:02:52 | menace | Edited notes |
| 2018-11-19 10:08:44 | gasman | Edited notes |
| 2018-07-20 06:41:38 | menace | Added Gaston as a member of Horizon |
| 2015-03-21 13:37:03 | menace | Edited notes |
| 2015-03-21 13:35:21 | menace | Edited notes |
| 2015-03-21 13:34:25 | menace | Edited notes |
| 2015-03-21 13:34:11 | menace | Edited notes |
| 2015-03-21 13:32:49 | menace | Added Mastermind as a member of Horizon |
| 2015-03-21 13:31:47 | menace | Edited notes |
| 2015-03-21 13:31:14 | menace | Edited notes |
| 2015-03-21 13:30:40 | menace | Edited notes |
| 2015-03-21 13:29:53 | menace | Edited notes |
| 2015-03-21 13:29:24 | menace | Edited notes |
| 2015-03-21 13:27:58 | menace | Edited notes |
| 2014-09-14 01:32:52 | dipswitch | Added Zagor as a member of Horizon |
| 2014-09-14 01:16:44 | dipswitch | Added Bagder as a member of Horizon |
| 2014-05-03 11:04:09 | menace | Edited notes |