IBM 2790 Manual page 77

Transaction nomenclature to be within this space and centered
about the two center lines for each transaction
Nomenclature for each guidance light is to be within appropriate box.
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Release
31 30
26
27
22
23
19
18
15
14
11 10
07 06
02
03
Repeat/
On
C le a r
Line
29 28
25 24
21 20
17
16
13 12
09
08
05
04
Select
01
Transaction
00
In
Card In
Process Card Reader