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this consists of a heavy blue 13-inch (foolscap or legal) sheet of paper, kept in the pc's folder and kept up to date every time a reliable item (or even last item "in")is found. On this line
plot one column, the left-hand one, is reserved for oppterms.
The right-hand column is reserved for terms and LIne~ indicate whenever terms or oppterms are derived from each other. A reliable item is designated as such on this line plot with the symbol R.I. Nonreliable items are not designated.
The date each line plot item was found is added after the item so it can be found again in the auditor's reports without a scramble. (HCOB 8 Nov 62)