Have you ever...
Used a telephone book
19.3%
Spoken to a (human) telephone operator
11.6%
Reversed charges on a call
7.4%
Made a call from pay phone / phone box
18.4%
Received a call on a pay phone / phone box
7.2%
Used a phone card
15.2%
Dialled from one exchange to another to route a call
2.6%
Used a rotary dial phone
18.2%
Poll ended at .

In terms of dialling through exchanges to make calls, see

https://www.ringbell.co.uk/nostalgia/AAZ.htm

STD Analogue Call Routing

@neil that's the only one I've never used.
@eco_amandine Ah - sadly, probably a hard blank to complete these days, outside a museum or homelab :(