Practical Applications of a SDMS (Scientific Data Management System)
1990s ke ngwagasome tšhupamabakeng ya Gregorian wa go thoma ka 1 Pherekgong 1990 ya fela ka 31 Manthole 1999. Ngwagasome 1990s o wela ngwagengkgolo wa 20.
| Ngwagakete: | Ngwagakete 2 |
| Mengwagakgolo: | Ngwagakgolo 19 – Ngwagakgolo 20 – Ngwagakgolo 21 |
| Mengwagasome: | 1960s 1970s 1980s – 1990s – 2000s 2010s 2020s |
| Mengwaga: | 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 |
| 1990s-tšago tswalanya: |
