Geoff Tootill: So, I've got the record of your programme here, Tom. This, er, is the original, er, notebook. And there it is in, er, Binary digits.
Tom Kilburn: Yes. We were still using the old notation there.
Geoff Tootill: Indeed.
Tom Kilburn: With, er, “C” for control and...
Geoff Tootill: Oh yes. And a curly “CL”... A curly “CL” for control and “C” for computer.
Tom Kilburn: That’s right. That’s right. Yes.
Geoff Tootill: Ie, the, er, arithmetic unit, as we’d call it today.
Tom Kilburn: Yes.
Geoff Tootill: Erm, and we’d, er, we hadn’t progressed as far as using teleprinter code instead of, er, noughts and ones.
Tom Kilburn: No. That’s right. So that we were reading, erm, you would read out...
Geoff Tootill: Nought, one, one, one.
Tom Kilburn: One. That’s right. Nought, one...
Geoff Tootill: And you would press the buttons.
Tom Kilburn: And I would... Yes, that’s right.
Geoff Tootill: (laughs)
Tom Kilburn: But I'm not as steel forth as I used to be then. (laughs)
Geoff Tootill: Yeah. There was no question of pressing chords like a Pianist would, we’d press the buttons one by one.
Tom Kilburn: One by one, yes. And these switches...
Geoff Tootill: Oh yes.
Tom Kilburn: To get the line in the right place.
Geoff Tootill: That’s right. We had to select the line we were going to type the stuff into...
Tom Kilburn: That’s right.
Geoff Tootill: Before we started pressing the buttons.
Tom Kilburn: And then when we’d got the programme all in there, we then cleared control, didn’t we?
Geoff Tootill: That’s right.
Tom Kilburn: And then cleared accumulator.
Geoff Tootill: Yes.
Tom Kilburn: Erm, and there it was. And then...
Geoff Tootill: Erm...
Tom Kilburn: ... we pressed some buttons...
Geoff Tootill: We...
Tom Kilburn: ... on the stop.
Geoff Tootill: Oh yes. We’d got a “Stop” and a “Run” switch.
Tom Kilburn: That’s right.
Geoff Tootill: This was the, er, switch for individual, erm...
Tom Kilburn: That’s right.
Geoff Tootill: ... impulses.
Tom Kilburn: That’s right.
Geoff Tootill: Pre-pulses. And this switched on continuously.
Tom Kilburn: Yes.
(End of transcript)