Please move if wrong section.
Years ago a screw needed only one type of screwdriver. A flat blade of the right size.
These days there's a multitude and sometimes the maker adds the type (e.g. for a screwdriver bit - PZ/P)on the shaft. But if not -they inscribe it on the holder.
Apart from having a large selection of tools ,this firm gives a list of the symbols for all sorts of items and names a lot of the security types of removal tools.
https://www.toolmanyardley.co.uk/symbols-keys/
No connection- thought the types of heads might be of use