| 51. | .xlc | Chart (Microsoft Excel) |
| 52. | .xld | Dialog sheet (Microsoft Excel) |
| 53. | .xlk | Backup (Microsoft Excel) |
| 54. | .xll | Dynamic link library (XLL) (Microsoft Excel) |
| 55. | .xlm | Macrosheet (Microsoft Excel) |
| 56. | .xls | Spreadsheet (Microsoft Excel) |
| 57. | .xlt | Template (Microsoft Excel) ◊ Translation table (Lotus 1-2-3 - Symphony - Procomm Plus) |
| 58. | .xlv | VBA (Visual Basic for Applications) module (Microsoft Excel) |
| 59. | .xlw | Workspace (Microsoft Excel) |
| 60. | .xm | Music (eXtended Module) (FastTracker - Cubic Player) |
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