Radio Shack TRS-80 Model II Reference Manual page 18

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General Information
Notation
For clarity and brevity, we use some special notation and type styles in this
book.
CAPITALS and punctuation
Indicate material which must be entered exactly as it appears. (The only
punctuation symbols not entered are ellipses, explained below.) For example,
in the line:
DIR SYS
every letter and character should be typed exactly as indicated.
lowercase italics
Represent words, letters, characters or values you supply from a set of
acceptable values for a particular command. For example, the line:
LIST filespec
indicates that you can supply any valid file specification (defined later) after
LIST.
. . . (ellipsis)
Indicates that preceding items can be repeated. For example:
ATTRIB filespec {option ,. .. }
indicates that several options may be repeated inside the braces.
Ii'
This special symbol is used occasionally to indicate a blank-space character
(ASCII
code 32 decimal, 20 hexadecimal).
RENAME~
FILE/A
JDTO
Yf
FILE/B
x'nnnn'
Indicates that nnnn is a hexadecimal number. All other numbers in the text of
this book are in decimal form, unless otherwise noted. For example:
X7000'
indicates the hexadecimal value 7000 (decimal 28672) .
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