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About This Manual
PC-OPDIO-16 User Manual x © National Instruments Corporation
• Appendix D, Status Codes, lists the status codes returned by NI-DAQ, including the name
and description.
• Appendix E, Customer Communication, contains forms you can use to request help from
National Instruments or to comment on our products.
• The Glossary contains an alphabetical list and description of terms used in this manual,
including abbreviations, acronyms, metric prefixes, mnemonics, and symbols.
• The Index alphabetically lists the topics in this manual, including the page where you can
find the topic.
Conventions Used in This Manual
The following conventions are used in this manual:
bold Bold text denotes menus, menu items, or dialog box buttons or options.
bold italic Bold italic text denotes a note, caution, or warning.
italic Italic text denotes emphasis on a specific board or on other important
information, a cross reference, or an introduction to a key concept.
monospace Text in this font denotes text or characters that are to be literally input
from the keyboard, sections of code, programming examples, and syntax
examples. This font is also used for the proper names of disk drives,
paths, directories, programs, subprograms, subroutines, device names,
functions, variables, filenames, and extensions, and for statements and
comments taken from program code.
NI-DAQ NI-DAQ refers to the NI-DAQ software for PC compatibles unless
otherwise noted.
PC PC refers to PC/XT/AT and IBM PS/2 models 25 and 30 computers.
Port A Port A refers to port A or port 0 (as in the NI-DAQ software portions of
this manual).
Port B Port B refers to port B or port 1 (as in the NI-DAQ software portions of
this manual).
< > Angle brackets containing numbers separated by an ellipsis represent a
range of values associated with a bit, port, or signal name (for example,
ACH<0..7> stands for ACH0 through ACH7).
Abbreviations, acronyms, metric prefixes, mnemonics, symbols, and terms are listed in the
Glossary.