AARP	Appletalk address resolution protocol
AAUI	Apple attachment unit interface
ABM	Asynchronous balanced mode
ACF	Advanced communication facility
ACK	Acknowledgement
ACL	Access control list
ACSE	Association control service element
ADB	Apple desktop bus
ADDCP	Advanced data communication control procedures
ADPCM	Adaptive differential pulse code modulation
ADSL	Asymmetrical digital subscriber line
ADSP	Appletalk data stream protocol
AE	Application entity
AEA	ASCII emulation adapter
AEP	Appletalk echo protocol
AFI	Authority and format identifier
AFP	Appletalk filing protocol
AIX	Advanced interactive executive
ALAP	Appletalk link access protocol
ALOE	Appletalk low overhead encapsulation
AM	Amplitude modulation
AMI	Alternate mark inversion
ANSI	American National Standards Institute
AOCE	Apple open collaborative environment
AOL	America On-Line
APAD	0 packet assembler disassembler
API	Application program interface
APPC	Advanced program-to-program communication
APPN	Advanced peer-to-peer networking
ARA	Apple remote access
ARP	Address resolution protocol
ARPA	Advanced Research Projects Agency
ARQ	Automatic repeat request
ASCII	American Standards Committee for Information Interchange
ASE	Application service element
ASN.1	Abstract syntax notation one
ASP	Appletalk session protocol
ATM	Asynchronous transfer mode
ATP	Appletalk protocol
AUI	Attachment unit interface
AURP	Appletalk Update-based routing protocol
AWG	American wire gauge
BBS	Bulletin board system
BCC	Block check character
BCD	Binary coded decimal
BCS	Basic combined subset
BER	Bit error rate
BERT	Bit error rate tester
BGP	Border gateway protocol
BIOS	Basic input output system
BISDN	Broadband integrated services digital network
BISYNC	Binary synchronous control
BIT	Binary digit
BIU	Basic information unit
BLU	Basic link unit
BOC	Bell operating company
BPS	Bits per second
BRI	Basic rate interface
BSC	Binary synchronous control
CAD	Computer aided design
CASE	Common application service element
CATV	Community antenna television
CBR	Committed burst rate
CC	Cluster controller
CCITT	International Telegraph and Telephone Consultative Committee
CCL	Connection control language
CCR	Commitment concurrency and recovery
CDDI	Copper data distributed interface
CDIS	Custom defined integrated services
CGI	Common gateway interface
CGP	Core gateway protocol
CIR	Committed information rate
CISC	Complex instruction set computer
CIX	Commercial internet exchange
CLNP	Connectionless network protocol
CMIP	Common management information protocol
CMIS	Common management information service
CO	Central office
COM	Commercial
COM	Common Object module
COS	Corporation for Open Systems
CPE	Customer premise equipment
CPU	Central processing unit
CRC	Cyclic redundancy check
CSMA/CD	Carrier sense multiple access with collision detection
CSU	Channel service unit
CTS	Clear to send
DAL	Database access language
DASD	Direct access storage device
DBMS	Database management system
DCE	Data circuit terminating equipment
DCE	Data communication equipment
DCE	Distributed computing environment
DDP	Datagram delivery protocol
DDS	Digital data service
DEC	Digital Equipment Corporation
DES	Data encryption standard
DLC	Data link control
DLCI	Data link connection identifier
DLE	Data link escape (character)
DME	Distributed management environment
DNA	Distributed network architecture (DEC)
DNS	Domain name server
DOS	Disk operation system
DPI	Dots per inch
DPLL	Digital phase-locked loop
DPSK	Differential phase shift keying
DQDB	Distributed queue, dual bus
DS	Directory services
DSAP	Destination service access point
DSE	Digital service unit
DSP	Digital signal processors
DSP	Domain specific part
DTE	Data terminal equipment
EBCDIC	Extended binary coded decimal interchange code
ECMA	European Computer Manufacturers Association
EDI	Electronic data interchange
EDU	Education
EFS	Error free seconds
EGP	Exterior gateway protocol
EIA	Electrical Industries Association
ELAP	Ethernet link access protocol
EMI	Electromagnetic interference
EMIF	ESCON multiple image facility
EOF	End of file
EOT	End of transmission
EPS	Encapsulated Postscript
ESCM	ESCON manager
ESCON	Enterprise systems connectivity
ESD	Electronic software distribution
ESD	Electrostatic discharge
ESF	Extended superframe
FAQ	Frequently asked questions
FC	Fiber channel
FCS	Frame check sequence
FDDI	Fiber distributed data interface
FDM	Frequency-division multiplexing
FEP	Front-end processor
FM	Frequency modulation
FRA	Frame relay adapter
FSK	Frequency-shift keying
FTAM	File transfer access and management
FTP	File transfer protocol
GIF	Graphics interchange format
GOSIP	Government OSI profile
GOV	Government
GUI	Graphical user interface
HCSS	High capacity storage system
HDLC	High-level data link control
HDSL	High bit rate digital subscriber line
HDX	Half duplex
HFS	Hierarchical filing system
HIPPI	High performance parallel interface
HMI	Hub management interface
HP-THT	High-priority token hold timer
HPFS	High performance file system
HSSI	High speed serial interface
HTML	Hypertext markup language
HTTP	Hypertext transport language
IA5	International alphabet number five
IAB	Internet Architecture Board
IBM	International Business Machines
ICMP	Internet control message protocol
IDE	Integrated drive electronics
IDI	Initial domain identifier
IDP	Initial domain part
IDP	Internet datagram protocol
IDRP	Interdomain routing protocol
IEC	Interexchange carrier
IEEE	Institute of Electrical and Electronics Engineers
IETF	Internet Engineering Task Force
IGP	Interior gateway protocol
IMAP	Interactive mail access protocol
IP	Internet protocol
IPC	Interprocess communication
IPX	Internet package exchange
IRC	Internet relay chat
IRQ	Interrupt request
IS	Intermediate system
ISDN	Integrated services digital network
ISO	International Organization for Standardization
ITU	International Telecommunications Union
IXC	Interexchange carrier
JCL	Job control language
JTM	Job transfer and manipulation
LAN	Local area network
LAP	Link access protocol
LAPB	Link access procedure balanced
LAPD	Link access protocol D-channel
LAT	Local area transport
LATA	Local area and transport access
LAVC	Local area Vax cluster
LAWN	Local area wireless network
LEC	Local exchange carrier
LED	Light-emitting diode
LLAP	Localtalk link access protocol
LLC	Logical link control
LSAP	Link service access point
LSL	Link support layer
LU	Logical unit
LXC	Local exchange carrier
MAC	Media access control
MAN	Metropolitan area network
MAP	Manufacturing automation protocol
MAPI	Message application programming interface
MAU	Multistation access unit
MB	Megabyte
MHS	Message handling service
MIB	Management information base
MIL	Military
MIME	Multipurpose internet mail extension
MIP	Million instructions per second
MLID	Multiple link interface driver
MMS	Manufacturing messaging service
MOP	Maintenance operations procedure
MOTIS	Message oriented text interchange system
MS-DOS	Microsoft disk operating system
MTA	Mail transfer agent
MTS	Message transfer system
MTU	Maximum transmission (transfer) unit
MUA	Mail user agent
MUX	Multiplexer
Mb	Megabit
Mbps	Megabits per second
NAK	Negative acknowledgement
NAK	Negative acknowledgement
NATA	National American Telephone Association
NAU	Network addressable unit
NBP	Name binding protocol
NBS	National Bureau of Standards
NCB	Network control block
NCCF	Network communications control facility
NCP	Netware core protocol
NCP	Network control program
NDIS	Network driver interface specification
NET	Network
NFS	Network file system
NIC	Network interface card
NIU	Network interface unit
NLDM	Network logical domain manager
NLM	Netware loadable module
NMS	Network management system
NOS	Network operating system
NPDA	Network problem determination manager
NREN	National Research and Educational Network
NRM	(Unbalanced) normal response mode
NRZ	Non-return to zero
NRZI	Non-return to zero inverted
NS	Network service
NSAP	Network service access point
NSDU	Network service data unit
OC	Optical carrier
OCR	Optical character recognition
ODA	Open document architecture
ODI	Open systems interconnection
ODI	Open data link interface
OLE	Object linking and embedding
OLTP	On-line transaction processing
OOP	Object-oriented programming
ORG	Organization
OS	Operating system
OSPF	Open shortest path first
PA	Point-of-attachment
PABX	Private automated branch exchange
PAD	Packet assembler-disassembler
PAP	Printer access protocol
PBX	Private branch exchange
PC	Personal computer
PCI	Peripheral component interconnect
PCN	Path control network
PDN	Public data network
PDU	Protocol data unit
PE	Presentation entity
PEP	Packet exchange protocol
PIU	Path information unit
PLP	Packet layer protocol
POP	Post office protocol
PPP	Point-to-point protocol
PPS	Packets per second
PPSDN	Public packet-switched data network
PSAP	Presentation service access point
PSDN	Packet-switched data network
PSK	Phase-shift keying
PSTN	Public-switched telephone network
PTT	Post telephone and telecommunications (authority)
PU	Physical unit
PVC	Permanent virtual circuit
QPSX	Queued-packet, distributed-switch
RAID	Redundant array of inexpensive disks
RAM	Random access memory
RARP	Reverse address resolution protocol
RBHC	Regional Bell holding company
RBOC	Regional Bell operating company
RCP	Remote communications processor
RF	Radio frequency
RIP	Routing infromation protocol
RISC	Reduced instruction set computing
RNR	Receiver not ready
ROM	Read only memory
ROSE	Remote operations service element
RPC	Remote procedure call
RTMP	Routing table maintenance protocol
RTS	Ready to send
RU	Request unit
RU	Response unit
SABM	Set asynchronous balanced mode
SAP	Service access point
SAR	Segmentation and reassembly
SASE	Specific application service element
SCC	Serial communications controller
SCSI	Small computer system interface
SDLC	Synchronous data link control
SDU	Service data unit
SE	Session entity
SEL	Selector
SFT	System fault tolerant
SGML	Standard generalized markup language
SGMP	Simple gateway monitoring protocol
SI	Subnet identifier
SIMM	Single inline memory module
SIP	SMDS Interface protocol
SLIP	Serial line internet protocol
SMB	Server message block
SMDS	Switched multimegabit data service
SMTP	Simple mail transfer protocol
SNA	Systems network architecture (IBM)
SNMP	Simple network management protocol
SNRM	Set normal response mode
SOF	Start of frame
SOFD	Start of frame delimiter
SONET	Synchronous optical network
SPF	Shortest path first
SPP	Sequenced packet protocol
SPX	Sequenced packet exchange
SSA	Serial storage architecture
SSAP	Session service access point
SSAP	Source service access point
SSCP	System services control point
TCP	Transmission control protocol
TCP/IP	Transmission control protocol/Internet protocol
TDM	Time division multiplexing
TE	Transport entity
TIC	Token ring interface card
TLA	Three letter acronym
TLI	Transport layer interface
TOP	Technical office protocol
TP_4	(OSI) Transport protocol class 4
TSAP	Transport service access point
TSE	Terminal switching exchange
TTL	Transistor transistor logic
UA	Unknown acknowledgement
UART	Universal asynchronous receiver/transmitter
UDP	User datagram protocol
UE	User element
UHF	Ultra-high frequency
UPS	Uninterruptible power supply
URL	Uniform resource locator
USRT	Universal synchronous receiver/transmitter
UTP	Unshielded twisted pair
UUCP	Unix-to-Unix copy program
VAX	Virtual address extension
VCC	Virtual channel connection
VCI	Virtual channel interface
VIP	Vines internet protocol
VPN	Virtual private network
VRML	Virtual reality markup language
VT	Virtual terminal
VTAM	Virtual telecommunications access method
WAIS	Wide area infromation servers
WAN	Wide area network
WLAN	Wireless local area network
WWW	World wide web
XDF	Extended distance fiber
XID	Exchange id
XNS	Xerox Network System
ZIP	Zone information protocol
ZIT	Zone information table