XLM: the eXcel Macro Language. Before VBA was brought into this world inside of Microsoft Office Products, there existed an old, archaic, strange, and yet popular XL Macro language. It still is supported as a legacy feature today. I think it came into play in Excel 4 or 5 (Office 2000 was version 9).

XLM skills are similar to COBOL skills in obscurity and usefullness.