IBM GX20-8020-1 UM010 Flowcharting Template

IBM GX20-8020-1 UM/010 Flowcharting Template

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This blue-green plastic template has twenty-six holes in the shape of flowcharting symbols, with an underlying grid of lines. Along the top is a scale of inches to tenths; along the bottom is a scale of inches to eighths. The blue and white paper sleeve explains symbols used. A mark on the template reads: FLOWCHARTING TEMPLATE. Another one reads: GX20-8020-1 U/M 010 (/) Printed in U.S.A. A mark on the envelope reads: (12-70). Further text there indicates that the form of the template conforms to 1970 ANSI standards, as well as International Organization for Standards (ISO) standards.
Currently not on view
Object Name
Logic Template
date made
ca 1970
Physical Description
paper (overall material)
plastic (overall material)
overall:.1 cm x 25.2 cm x 11.5 cm; 1/32 in x 9 29/32 in x 4 17/32 in
ID Number
nonaccession number
catalog number
Credit Line
Gift of Prof. Michael R. Williams
See more items in
Medicine and Science: Mathematics
Flowcharting Templates
Science & Mathematics
Data Source
National Museum of American History
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Question: The IBM Flowcharting Worksheet (GX20-8021-2 U/M 060) had on the front side had 10 rows of blocks (A1 - K1) and 5 columns labeled A1-A5). A programmer were enter symbols from a GX20-8020 template which represented the steps in program. The back of the worksheet had a matrix of 1/2" squares (20 columns x 26 rows). What was the matrix on the back used for?

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