Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 433)

Section 11. Glossary
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global variable
A variable available for use throughout a CRBasic program. The term is
usually used in connection with subroutines, differentiating global
variables (those declared using Public or Dim) from local variables,
which are declared in the Sub() and Function() instructions.
ground
Being or related to an electrical potential of 0 Volts.
half duplex
Systems allow bi‐directional communications, but not simultaneously.
handshake, handshaking
The exchange of predetermined information between two devices to
assure each that it is connected to the other. When not used as a clock
line, the CLK/HS (pin 7) line in the datalogger CS I/O port is primarily
used to detect the presence or absence of peripherals.
Hello Exchange
The process of verifying a node as a neighbor.
Hertz
Abbreviated "Hz." Unit of frequency described as cycles or pulses per
second.
HTML
Hypertext Markup Language. A programming language used for the
creation of web pages.
HTTP
Hypertext Transfer Protocol. A TCP/IP application protocol.
IEEE4
Four‐byte, floating‐point data type. IEEE Standard 754. Same format as
Float. Float is the name used when declaring data type for Public or Dim
declared variables.