Interagency Internet 



The federally funded part of the Internet that is directly used by the HPCC Program. It 

 includes NSFNET, ESnet, and NSI. The Interagency Internet is also the name of an element 

 of the NREN component of the HPCC Program, and is the successor to the Interagency 

 Interim NREN(IINREN). 



Internet 



The global collection of interconnected, multiprotocol computer networks including Federal, 

 mid-level, private, and international networks. The Interagency Internet is a part of the 

 Internet, and NSFNET, ESnet, and NSI are part of the Interagency Internet. 



InterNIC 



Internet Network Information Center 



Interoperability 



The effective interconnection of two or more different computer systems, databases, or net- 

 works in order to support distributed computing and/or data exchange 



ISDN 



Integrated Services Digital Network 



Kb/s 



Kilobits per second or thousands of bits per second 



LAN 

 Local Area Network 



Mb/s 



Megabits per second or millions of bits per second 



MIMD 



Multiple Input Multiple Data 



MPP 



Massively parallel processor 



NAPs 



Network Access Points, a set of nodes connecting mid-level or regional networks and other 

 service providers to NSFNET 



NASA 

 National Aeronautics and Space Administration 



National Challenge 



A fundamental application that has broad and direct impact on the Nation's competitiveness 

 and the well-being of its citizens, and that can benefit by the application of HPCC technology 

 and resources 



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