WK1 dosya biçimi
| Dosya uzantısı | .wk1 |
| Dosya kategorisi | documents |
| MIME türü | 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 |
| Dosya uzantısı | .wk1 |
| Dosya kategorisi | documents |
| MIME türü | 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 |