WK1 format pliku
| Rozszerzenie | .wk1 |
| Kategoria | documents |
| Typ MIME | application/vnd.lotus-1-2-3, application/x-123 application/lotus123 application/x-lotus123 application/wk1 application/vnd.ms-excel zz-application/zz-winassoc-wk1 |
| Rozszerzenie | .wk1 |
| Kategoria | documents |
| Typ MIME | application/vnd.lotus-1-2-3, application/x-123 application/lotus123 application/x-lotus123 application/wk1 application/vnd.ms-excel zz-application/zz-winassoc-wk1 |