Internet Resources for Chapter 18

Filters: Counting and Formatting


How Unix uses tabs (tabs command)
Setting tabs with ttty:
  For horizontal tabs, search for tab0; for vertical tabs, search for vt0

expand, unexpand

Formatting text: fold, fmt, pr

Punch cards

Herman Hollerith and his inventions (drawings of tabulator)

History of U.S. banknotes

History of IBM

nanorc files

Line printers

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