Reference Manual IBM 29 Card Punch - Mass:Werk

Models
The mM 29 Card Punch is available in nine different
models:
MODEL NAME KEYBOARD FEATURE
All Basic Card Punch 12-character
A 12 Basic Card Punch 64-character
A21 Basic Card Punch 12-character Print
A 22 Basic Card Punch 64-character Print
Bll Left-Zero Insertion
Card Punch 12-character
B 12 Left-Zero Insertion
Card Punch 64-character
B 21 Left-Zero Insertion
Card Punch 12-character Print
B22 Left-Zero Insertion
Card Punch 64-character Print
C22 Interpreting Card
Punch 64-character Print
Figure 3. Numeric and Combination Keyboards
8
The Model A is the basic card p1,lnch. It can have
either the numeric (12-character) keyboard or the
combination (48- or 64-character) keyboard (Figure
3 ) ; it can be a print or a nonprint model.
The Model B, or Left-Zero Insertion Card Punch,
has the same keyboard or print/ nonprint specifications
as the Model A, performs the same functions as the
Model A, and in addition, features left-zero insertion.
With left- zero insertion, it is unnecessary to key zeros
to the left of the first significant digit in numeric fields.
This feature must be programmed; it can be programmed
to insert zeros in fields that are three to
eight digits in length.
The Model C, or Interpreting Card Punch, is available
only with the combination keyboard, pedorms the