That's a bit derogatory, terambulan.
PCs have been around for a long time, and many OAPs are more than pc literate.
Yes, the driver has a device to register the passengers - OAPs and travelcards.
In the West Midlands, senior citizens have had free bus travel for well over 40 years. It used be much more limited (after 9.30am and not between 3pm and 6.30pm) but it has always worked very well. It has helped keep bus routes open, as some journeys would only have OAPs on board now and again.
Some councils used to operate a scheme which I think is probably the best of all. 20 free tokens a month, one token being a free bus journey. If they wanted more, the tokens could be bought for 30p each.