PU (Physical Unit)

In the IBM Systems Network Architecture (SNA), a device that manages the com-

munications hardware and software, participating in the controlling and routing of network communications.

All physical devices are assigned a PU Type (1, 2, 3, or 5) that identifies the level of the device (terminal, controller, communications processor, or host node) and its origin (IBM/SNA or non-IBM/SNA). See also hardware, SNA, and software.

• IA (Implementation Agreement)
• IANA (Internet Assigned Numbers Authority)
• ICANN (Internet Corporation for Assigned Names and Numbers)
• ICASA (Independent Communications Authority of South Africa)
• ICEA
• ICEA (Insulated Cable Engineers Association)
• ICE (In Case of Emergency)
• icky-pic (icky–plastic insulated cable)
• ICMP (Internet Control Message Protocol)
• ICMP (Internet Control Message Protocol)
• ICST (Information and Communication Science and Technology)
• ID
• IDDD (International Direct Distance Dialing)
• IDF (Intermediate Distribution Frame)
• IDSL (ISDN Digital Subscriber Line)
• IDU (Interface Data Unit)
• IEC
• IEC
• IEEE
• IEEE (Institute of Electrical and Electronics Engineers)
• i.e. (id est)
• IE (Internet Explorer)
• IESG (Internet Engineering Steering Group)
• IETF (Internet Engineering Task Force)
• I/F (Inter/Face)