| 2024-10-05 23:38:05 | Brittle | Added credit for Decca on Short Circus: Graphics (font) |
| 2024-06-20 17:17:31 | decca | Set location to Lower Saxony, Germany |
| 2024-06-20 17:15:57 | dave84 | Added credit for Decca on AssemblyTV Megademo: Other (Tooling) |
| 2024-06-15 22:18:46 | Brittle | Added credit for Decca on Renovated: Graphics (ascii) |
| 2024-06-15 19:46:18 | decca | Added credit for Decca on Bird of the Opera: Graphics |
| 2024-04-30 07:52:49 | decca | Updated Decca's credit on Loading: Graphics |
| 2024-03-31 18:23:51 | decca | Added credit for Decca on GRMA: Graphics, Other (Tooling) |
| 2024-03-24 07:58:12 | menace | Updated Decca as organiser of Mekka & Symposium 2002: changed role to voting, misc |
| 2024-03-24 07:57:34 | menace | Added Decca as organiser of Mekka & Symposium 2002 |
| 2024-01-06 18:58:32 | decca | Added credit for Decca on Belgian Greetz: Graphics |
| 2024-01-06 17:27:25 | decca | Added credit for Decca on Verisimilitude: Graphics |
| 2023-10-03 19:49:28 | decca | Added credit for Decca on mulTIColor: Code |
| 2023-09-09 23:18:49 | decca | Added credit for Decca on dutch greetz: Graphics |
| 2023-07-29 22:01:57 | decca | Added credit for Decca on Train to Lichthaus: Code, Graphics |
| 2023-06-26 00:24:18 | decca | Added credit for Decca on You Better Walk: Code, Graphics |
| 2023-06-24 22:01:34 | Brittle | Added credit for Decca on Nova: Graphics (ascii) |
| 2023-01-07 15:06:32 | mantratronic | Added credit for Decca on Jaaam: Graphics (font) |
| 2022-08-13 22:26:01 | decca | Added credit for Decca on Block Rockn Cubes: Graphics |
| 2022-01-04 21:35:00 | Bossman | Added credit for Decca on Synthvester: Text (ASCII NFO) |
| 2022-01-04 21:28:31 | decca | Added Decca as organiser of 680xx Convention 1993 |
| 2022-01-04 21:26:21 | decca | Added Decca as organiser of Mekka & Symposium 1997 |
| 2021-12-31 18:00:29 | Brittle | Added credit for Decca on Duck Jam: Code |
| 2021-11-04 20:12:42 | decca | Added credit for Decca on TicMcTile: Code |
| 2021-10-31 20:59:16 | decca | Added credit for Decca on Roasted Lemon Shark: Code |
| 2021-09-26 20:25:09 | decca | Added credit for Decca on Claws of the Tenticle: Other (Toolcode) |
| 2021-09-26 20:24:46 | decca | Added credit for Decca on Claws of the Tenticle: Graphics |
| 2021-08-15 22:15:22 | Bossman | Added credit for Decca on Mental Relapse!: Other (ASCII logo) |
| 2021-05-22 17:26:24 | Bossman | Added credit for Decca on Gael Loves Gaul: Other (NFO ASCII) |
| 2021-01-19 23:00:31 | dipswitch | Added Decca as organiser of Mekka & Symposium 1999 |
| 2021-01-08 13:49:24 | dipswitch | Added Decca as organiser of Symposium 1996 |
| 2021-01-08 04:41:34 | menace | Updated Decca as organiser of Mekka & Symposium 1998: changed role to amiga, general |
| 2021-01-08 04:40:03 | menace | Added Decca as organiser of Mekka & Symposium 1998 |
| 2021-01-07 14:21:42 | menace | Added Decca as organiser of Mekka & Symposium 2001 |
| 2021-01-07 13:40:45 | menace | Edited notes |
| 2021-01-07 13:38:34 | menace | Added Decca as organiser of Mekka & Symposium 2000 |
| 2021-01-01 19:28:27 | mantratronic | Added Decca as a member of Tea Lovers Committee |
| 2021-01-01 04:48:15 | Brittle | Updated Decca's membership of Mainzelmännchen Production: set as ex-member |
| 2021-01-01 00:33:03 | Brittle | Added credit for Decca on Many Hogs: Graphics |
| 2020-09-05 21:45:20 | decca | Updated Decca's credit on TTrak Beta V1: Graphics (Intro) |
| 2020-09-05 21:45:02 | decca | Added credit for Decca on TTrak Beta V1: Graphics ((Intro)) |
| 2020-08-05 23:08:15 | adept | Updated Decca's membership of Adept: changed group to Adept |
| 2020-06-02 16:48:57 | Bossman | Added credit for Decca on Misery: Other (ASCII NFO) |
| 2020-05-10 12:20:04 | menace | Updated Decca's credit on Upstream 10: Text (editor staff) |
| 2020-05-10 12:15:53 | menace | Added credit for Decca on Upstream 10: Text (editor) |
| 2020-02-08 23:54:23 | Brittle | Added credit for Decca on Technology of the Ancients: Graphics |
| 2019-06-22 22:11:18 | Brittle | Added credit for Decca on Earthxit: Graphics |
| 2018-12-30 10:46:43 | menace | Added link http://janeway.exotica.org.uk/author.php?id=8936 |
| 2018-12-25 06:54:12 | menace | Added credit for Decca on Equipose: Text |
| 2018-02-21 21:06:11 | menace | Edited notes |
| 2018-02-20 20:21:57 | menace | Added credit for Decca on R.A.W 4: Text (news staff) |
| 2017-08-20 14:30:28 | Bossman | Added Decca as a member of Rift |
| 2017-07-08 21:25:47 | menace | Added credit for Decca on Mekka & Symposium 98 Invitation: Graphics (fonts) |
| 2017-03-15 08:55:51 | dipswitch | Edited notes |
| 2017-03-15 08:55:46 | dipswitch | Set location to Free and Hanseatic City of Hamburg, Hamburg, Germany |
| 2017-03-15 08:55:43 | dipswitch | Updated visibility of real name |
| 2016-03-20 08:09:55 | menace | Added credit for Decca on Never Liked Uno: Text |
| 2015-10-06 07:50:25 | menace | Added credit for Decca on R.A.W 9: Text (editor) |
| 2015-04-05 11:11:30 | tomaes | Added credit for Decca on Majesty of Sprites: Graphics |
| 2014-05-08 11:04:19 | tomaes | Added credit for Decca on Cosmonautic Jazz: Graphics (2d, animations) |
| 2014-03-30 11:24:38 | ltk_tscc | Added credit for Decca on 680xx Convention 1993 Invitation: Other (Text) |
| 2014-03-28 13:43:09 | menace | Added credit for Decca on Symposium 96 Invitation: Graphics |
| 2014-02-08 01:26:33 | dipswitch | Added credit for Decca on Zine 14: Other (Articles) |
| 2014-01-05 17:08:24 | nero | Updated Decca's credit on States United: Graphics (Fonts) |
| 2014-01-04 22:01:35 | noname | Added credit for Decca on Super Unknown: Graphics |
| 2013-12-30 16:16:21 | nero | Added credit for Decca on Threeve: Graphics |
| 2013-03-31 11:11:58 | menace | Added credit for Decca on Architectures: Other (video encoding) |
| 2012-12-22 03:03:39 | menace | Edited notes |
| 2012-12-22 03:03:32 | menace | Edited notes |
| 2012-12-22 03:03:06 | menace | Added Decca as a member of Supplex |
| 2012-12-22 03:02:56 | menace | Added Decca as a member of Adept |
| 2012-08-13 15:01:25 | dipswitch | Added credit for Decca on States United: Graphics |