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| IBM 407 Accounting Machine |
 Models available |
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Model Al or Model A2 for use either with 650 or for independent operation |
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| IBM 407 Accounting Machine |
| Models available |
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Model Al or Model A2 for use either with 650 or for independent operation |
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| Speed |
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150 cards-per-minute input, maximum |
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150 lines-per-minute output, maximum |
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120 alpha-numerical characters per line |
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| Summary Punch |
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IBM 514, 519 and 523 Summary Punches can be used with the 407 when the 407 is attached to the 650 |
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| IBM 533 Read-Punch Unit |
| Speed |
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200 cards-per-minute input, maximum |
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100 cards-per-minute output, maximum |
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| Standard features |
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10 pilot selectors |
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8 co-selectors |
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1 read-digit selector |
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1 punch-digit selector |
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20 positions double punch and blank-column detection |
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4 positions punch delay |
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| Optional features |
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10 pilot selectors |
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8 co-selectors |
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1 read-digit selector or 1 read half-time emitter |
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1 punch-digit selector or 1 punch half-time emitter |
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60 positions double punch and blank-column detection |
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1 offset stacker |
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10 read-code and punch-code selectors |
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| IBM 650 Console Unit |
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Central processing unit for all input-output combinations. Houses magnetic drum storage, arithmetical device, operator's console |
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| IBM 652 Control Unit |
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Controls operation of magnetic tape units |
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| IBM 653 Auxiliary Unit |
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Integral component of tape processing combinations, available separately as high speed "working" storage to increase 650 processing speeds |
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| Type of storage |
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High-speed magnetic cores |
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| Capacity |
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600 digits (60 words) |
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| IBM 655 Power Unit |
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Houses 650 power supply, translating circuitry |
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| IBM 727 Magnetic Tape Unit |
| Tape characteristics |
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Lengths |
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a) Acetate 2,400 feet |
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b) Mylar 200 and 600 feet |
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Density |
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200 characters per inch |
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Speed |
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Reading: 75 inches per second |
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Writing: 75 inches per second |
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Rewinding: 500 inches per second |
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| Record length |
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10 to 600 digits (1 to 60 words) |
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| Number of records per reel of tape (2,400 feet) |
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Digits/record |
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Records/reel |
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100 |
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23,040 |
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200 |
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16,457 |
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300 |
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12,800 |
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400 |
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10,472 |
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500 |
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8,861 |
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600 |
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7,680 |
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| Tape passing speed in records per minute (read, compare, write) |
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Digits/record |
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Records/minute |
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100 |
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1,535 |
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200 |
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1,139 |
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300 |
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905 |
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400 |
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751 |
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500 |
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642 |
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600 |
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560 |
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| For incorporation with all 650 combinations as required |
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| Alphabetic Device |
| Input-Output capacity |
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Thirty positions distributed in the first 6 storage-entry and storage-exit words |
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| Characters handled |
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All 26 alphabetic characters plus the 10 numerical digits |
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| Special Character Device |
| Input-Output capacity |
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Same as alphabetic device |
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| Characters handled |
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Group I: eleven and twelve punch characters |
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Group II: all 407 special characters, including eleven and twelve punches |
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| Floating-Point arithmetic |
| Function |
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Provides individual operation codes for automatic processing of floating decimal arithmetic |
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| Approximate calculating speeds (optimally programmed) |
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35,300 floating additions or subtractions per minute (4 shifts) |
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6,000 floating multiplications per minute (multiplier = 55,555,555) |
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3,800 floating divisions per minute (divisor = 55,555,555) |
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| Indexing Accumulators |
| Function |
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Provide for data address and instruction address modification. Reduce instruction storage requirements |
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| Capacity |
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Three 4-position accumulators |
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Models available
