I used to do business with Robox who were originally calculator specialists.
Yes, really, that's all they sold when they opened. There was another office equipment business there for a few years called Clydeforth, who were Glasgow's Olivetti typewriter dealer.
McConomys was quite the place to go for a while. I remember buying an album there, "The Hobos play Sounds Like Slade". Christ, you should of heard it! Whenever someone mentions McConomys to me now I always pair it in my mind with Woolco in Cumbernauld which was similarly "destination" shopping in the mid seventies. IE people used to go there for an afternoon out. Woolco is of course, no longer with us either.
I am very surprised that no-one has mentioned the Travelators in the Anderson Centre yet. Yes, the place was so space age that shoppers weren't really expected to walk. There were Travelators to move you about. Admittedly, they were hardlly ever switched on.
Alter Aterius Auxilio Veget