Ngwagakete: Ngwagakete 1
Mengwagakgolo: Ngwagakgolo 9Ngwagakgolo 10Ngwagakgolo 11
Mengwagasome: 960s  970s  980s  – 990s –  1000s  1010s  1020s
Mengwaga: 987 988 989990991 992 993

990 (CMXC) ebile ngwaga wa go thoma ka Labohlano, ngwaga wa pele ngwagengsome wa 990s, ngwaga wa bomasomesenyane ngwagengkgolo wa Ngwagakgolo 10, le ngwaga wa bomakgolo senyane masomesenyane ngwagengkete wa Ngwagakete 1.