I've found a timetable for sports courses. The columns seem to describe ID, time and something more. What could A, L and F mean?
Badminton 10101 L Mo 20.00-21.30 10102 A Di 17.00-18.30 10106 A Do 17.00-18.30 10108 A Di 17.00-18.30 10109 F Di 17.00-18.30 Basketball 10301 A Mo 17.00-18.30 10302 F Mo 17.00-18.30 10303 L Frauen Mo 18.30-20.00 10304 L Männer Mo 18.30-20.00 10305 F Di 18.30-20.00 10308 F Frauen Do 17.00-18.30 10309 F Männer Do 18.30-20.00
The actual table does not provide column titles or a legend.
Other texts are written at some rows, such as "freies Spiel" and "Auswahl". This leads me to think that that's what A and F stand for. However, it doesn't explain L, and it wouldn't make much sense to abbreviate some cells but not others.