My first job was for Post Office Telephones (as they were known before BT!.
This was it:
Letter come in to Clerical Assistant's (post person, not me) IN tray . Post got sorted and put into relevant Clerical Officer's IN tray)
The Clerical Officer would look at letter or answer phone to customer and note(handwrite) down what was required on a special docket. Then put it in their OUT tray for Clerical Assistant (filing) (Me) to get the correct file card of the telephone number out of the millions of cards we had filed by
Clerical Assistant (me)would pick up pile of dockets, find all file cards, attach to dockets and put back docket and file card in Clerical Officers IN tray.
Clerical officer then hand wrote out the order using special shorthand codes on an individually numbered Advice Note which had carbon copy under. Then fill in the file card with the new advice note details then put all that in OUT tray
Clerical Assistant (me) (filing) would collect the cards and put them back into the file and Pick up next batch to do.
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Clerical Assistant 2 (post and advice notes etc) picked up all Advice notes and took them to small airless room to run them off on Banda machine .. the fumes would make you feel sick.
Each Advice Note had 7 copies for different departments. Post Clerical Assistant would send them to the relevant departments and master copy would be put in a book.
When each department did their bit , they would send their advice note copy back to department.
Clerical assistant (me) would collect each copy, get out file card again and attach it to correct file card and put it in Clerical Officers IN tray.
Clerical officer would mark that that bit had been done and put it back into their OUT tray ,
Clerical Assitant would put card and completed advice note back in file. and pick up next batch to do
This was 1974. I left Grammar school with several good O levels to do that job and it was considered a very good job for an educated 'girl' to have at the time!
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I still have nightmares about that job!
I went back to do a levels and went to university later on!!