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GLOSSARY
RFC (Requests for Comment)
This document issued by the IETF relates
to technical information for the Internet,
and comprises further documents that are
identified by number. RFC describes proto-
col sets or HTML language.
RTC
RTC stands for Real Time Clock, the clock
circuit that counts date and time.
V
Vertical scanning
Reading of documents in the vertical direc-
tion is called "vertical scanning," and the
number of scanlines per unit length when
the document is separated in the vertical
scanning direction is called the "vertical
scanning density" (vertical resolution). G3
facsimiles separate documents into 3.85
lines, 7.7 lines or 15.4 lines per 1 mm, so
the vertical scanning density becomes one
of 3.85 lines/mm, 7.7 lines/mm or 15.4
lines/mm.
A–70
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