IT DICTIONARY POCKET

7. DAFS Direct an advanced
Attached methodology of a
File particular network data
System storage method.

8. DAML DARPA A language currently in
Agent development for
Markup presenting information
Language on the that will allow
information objects to
be tagged in a way that
allows software
applications, computer
agents, and virtual
assistants.

9. DAP Directory A derivative of the
Access X.500 DAP standard,
Protocol postulated by the ISO
many years ago. DAP
and X.500 remained
unused for many years
because of the
complexity of the DAP
access protocol.

76

10. DARPA Defense the progenitor of the
Advanced Internet. DARPA is
Research where it all began.
Project
Agency

11. DASH Desktop Suite of specifications
12. DAST and mobile that takes full
Architecture advantage of the Web
for System Services for
Hardware Management (WS-
Management)
specificationdelivering
standards-based Web
services management
for desktop and
mobile client systems

Dynamic technologies designed
Application to detect conditions
Security indicative of a security
Testing vulnerability in an
application in its
running state

77

13. DAVID Digital Digital Audio Video
14. DB2 Audio Interactive Decoder
Video
15. DB9 Interactive
Decoder

Database 2 IBM's RDBMS
offering, originally
D sub- built for Multiple
miniature 9 Virtual Storage
(MVS) systems. It
uses SQL as its data
manipulation and
definition language.
IBM has released
versions of DB2 for
several other
operating systems,
such as Windows and
Unix.
Also called Dsub9, a
9 pin connector
shaped like the leter
‘D’. They are used to
connect serial devices
together with a serial
cable.

78

16. dBm decibels used to measure signal
milliwatt strength on telephone
lines

17. DCB Data a set of IEEE industry
18. DCBU Center standards that delivers
Bridging end-to-end congestion
notification and quality
D-channel of service throughout
backup the network which
allows customers to
configure traffic
classes and priorities to
deliver a lossless
Ethernet fabric such as
Open FCoE.

An ISDN NFAS
configuration where
two of the T1 facilities
have a D-channel, one
of which is used for
signaling, and the other
as a backup in case the
other fails.

79

19 DCCP Datagram a minimal general
20. DCO Congestion purpose transport-
Control layer protocol that
Protocol minimizes the
overhead of packet
header size or end-
node processing as
much as possible.

Device Allows system
Configuration vendors to purchase
Overlay HDDs from different
manufacturers with
potentially different
sizes, and then
configure all HDDs
to have the same
number of sectors

21. DDL Data A language for
Definition describing data and
Language its relationships in a
database.

80

22. DDN Digital A network service
Data established in China in
Network 1994, connecting
Beijing, Tianjin,
Shanghai and other
provincial capitals. Each
post and
telecommunications
administration in China
has a department
regulating DDN service
in its region.

23. DDP Datagram In AppleTalk networks,
Delivery a protocol that provides
Protocol network connectivity by
means of connectionless
socket-to-socket
delivery service on the
internet layer.

24. DEL DELETE the DELETE key on a
computer keyboard

81

25. Demarc Demarcation The point, jack or
26. DEN Point cross connect panel,
at which ownership
or responsibility for
operating and
maintaining facilities
passes from one
party to another.

Directory term used in
Enabled conjunction with an
Network architecture and
grouping of
networking
capabilities that are
developed and
driven by a central
directory.

27. DFI Design for DFI Inc. (Design for
Innovation Innovation)

82

28. DFL design for A product design
29. DHCP logistics approach that
considers logistical
30. DHX Dynamic issues, such the
Host manner in which the
Configuration product will be
Protocol stored or transported.
A network server
Diffie- uses this protocol to
Hellman dynamically assign
Exchange IP addresses to
networked
computers. The
DHCP server waits
for a computer to
connect to it, then
assigns it an IP
address from a
master list stored on
the server.
an authentication
method used by the
Apple file service of
Mac OS X Server.

83

31. DICOM: Digital Imaging a standard for
and handling, storing,
Communications printing, and
in Medicine transmitting
information in
medical imaging.

32. DID direct inward Allows a user
33. DIIOp dial outside a
company to dial
Dominio Internet an internal
Inter-Orb Protocol extension
number without
84 needing to pass
through an
operator or an
attendant. The
dialed digits are
passed to the
PBX, which then
completes the
call.
allows external
programs to
attach to, and
manipulate
Domino
databases

34. Dirid Directory A numeric identifier
35. DIT identifier used within INF files
to represent a disk
directory.

Directory A graphical display of
Information an organization's
Tree directory structure,
sites, and servers,
shown as a branching
structure. The top-
level (root) directory
usually represents the
organization level

36. DITTO Data An IBM licensed
Interfile program that provides
Transfer, file-to-file services for
Testing and card I/O, tape, and
Operations disk devices.

85

37. DIX Digital, The first letter of the
Intel , Digital Corp, the Intel
Xerox Corp, and the Xerox
Corp, which are the
leading vendors
defined the original
Ethernet standards.

38. DKI Driver An interface between
39. DLDP Kernel the UNIX system
Interface kernel and different
types of drivers. DKI
Device consists of a set of
Link driver-defined
Detection functions that are
Protocol called by the kernel.
These functions are
entry points into a
driver.

detect the link status of
a fiber cable or twisted

86

40. DLPBC Dual Loop routing circuitry that
41. DLT Port makes it possible to
Bypass add and remove nodes
Circuitry without disrupting the
network.

Digital A magnetic tape
Linear technology that uses
Tape half-inch, single-hub
cartridges,writes 128
or 208 linear tracks,
and provides
capacities from 40
to80GB. A technology
designed by DEC and
sold to Quantum

42. DMA Direct A technique of
Memory transferring data
Access between the computer
memory and a device
on the computer bus
without the
intervention of the
microprocessor.

87

43. DMAA Discrete Discrete
Mathematics, Mathematics,
Algorithms Algorithms and
and Applications
Applications

44. DML Data a family of
45. DMS Manipulation computer languages
Language used by computer
programs or
Digital database users to
Multiplex retrieve, insert,
Systems delete and update
data in a database.
The currently most
popular Data
manipulation
language is that of
SQL, which is used
to retrieve and
manipulate data in a
Relational database.
System that
combines number of
digital circuits.

88

46. DMT Discrete an ADSL modulation
47. DNIC Multi-Tone technique that splits
bandwidth usage
data network usage into sub-
identification channels for
code maximum data
transfer. A channel is
then optimized for
modulation if certain
channels cannot
transmit data.
A 4-digit code that
specifies the X.21
call format used by a
network in its
International Data
Number to call
another station.

48. DNLC Directory Unix file cache
Name
Lookup
Cache

89

49. DNR Digital Noise Ensures
50. DoCoMo Reduction superior picture
quality by
Domain Name "cleaning"
System images and
SECurity reducing picture
extensions "noise".
Particularly
useful for older
movies where
the source
master has
picture noise.
DoCoMo
(meaning
"anywhere" in
Japanese) is a
NTT subsidiary
and Japan's
biggest mobile
service provider

51. DO-IT Disabilities, Disabilities,
Opportunities, Opportunities,
Internetworking Internetworking
and and Technology

Techn9ol0ogy

52. Dolly Digital a program that can
53. DOM Dolly quickly clone
54. DOMAIN (copy) drives to
Document drives, drives to
Object files, files to drives,
Model or files to files. It is
similar to the
Distributed Symantec product
Operating known as Ghost.
Multi A platform-neutral
Access and language-
Interactive neutral interface
Network that allows
programs and
scripts to access
and update the
content, structure,
and style of
documents
dynamically.
Distributed
Operating Multi
Access Interactive
Network

91

55. DOP Dilution Of One of many quality
56. DOS Precision measurements to
57. DPtoTP evaluate solutions
Disk derived by a
Operating positioning receiver.
System This is a numeric
value that relates
Display relative geometries
Coordinates between positioning
TO Tablet satellites as well as
Coordinates the geometries
between the satellites
92 and the receiver.
A command-driven
PC OS that resides in
main memory and
uses disks for data
storage. It was once
the standard OS for
IBM-compatible
PCs. Early versions
of Microsoft
Windows ran on top
of DOS.
Coordinates
conversion

58. DQM Data Oracle CDH engine
Quality
Manager

59. DRE Document Collection of Java
60. DRi Rendering classes that can be used
Engine to define an abstract
document and render it
Disaster in PDF or HTML. A
Recovery document consists of a
Institute collection of elements
such as text, lists
(bulleted, numbered,
plain), tables, images,
fonts, color, etc.

DRI International was
founded in 1988 in
order to develop a base
of knowledge in
contingency planning
and the management of
risk, a rapidly growing
profession.

93

61. DRU Disc Tool designed to create
Remastering a customized copy of
Utility the Ubuntu Linux
Distribution.

62. DS0 Digital A 64 Kbps unit of
63. DS1 Subscriber transmission
Level Zero bandwidth. A
worldwide standard
Digital speed for digitizing one
Signal voice conversation, and
Level 1 more recently, for data
transmission. Twenty-
four DS0s (24x64
Kbps) equal one Digital
Signal Level 1 (DS1).

Framing specification
used in transmitting
digital signals at 1.544
Mbps on a T1 facility
or 2.048 Mbps on an
E1 facility.

94

64. DSBM Designated A device on a
65. DSI Subnet managed
66. DSLAM Bandwidth subnetwork that acts
Manager as the Subnet
Bandwidth Manager
for the subnetwork
to which it is
attached

Dynamic Microsoft's
Systems technology strategy
Initiative for products and
solutions that help
businesses enhance
the dynamic
capability of its
people, process, and
IT infrastructure
using technology

DSL device that joins a
Access high-speed computer
Multiplexer network to a set of
ordinary telephone
lines in a telephone
company central
office.

95

67. DSO data source A DSO exploit is a form
68. DSR object of spyware that takes
advantage of data
Data Set binding to gain access to
Ready the hard drive of a
computer connected to
the Internet. Such
spyware can be difficult
to detect and eradicate,
and if it is successfully
removed, it often
returns.

A serial connectivity
term, used primarily
with printers and
modems in modern
systems. DSR is the
primary computer signal
line for hardware
handshaking over a
serial interface; connects
to the DTR line at the
computer.

96

69. DSU data A simplified modem for
70. DTS service unit the transmission of
digital data over a
Digital private line or for
Theater limited-distance
System communications over
the PSTN, where it is
not necessary to comply
with all the requirements
for a high-speed
modem.
Special system used for
encoding and decoding
an audio signal on
multiple channels, used
in cinemas and home-
use theater systems as
well. Used for the first
time by movie director
Steven Spielberg, DTS'
most common channel
array comprises 5.1
channels (5 fullrange
and one for the
subwoofer). Dolby
Digital is DTS' most
notable competitor.

97

98

71. DTR Data It is a primary serial
72. DTTV Terminal printer signal for
Ready hardware handshaking
over a serial interface;
Digital connects to the DSR
Terestial pin at the computer.
Televison
broadcasts over
earthbound circuits so
sateliites aren't used
for any part of the link
between the
broadcaster and the
end user.

73. du disk usage du is a standard Unix
74. DUN program used to
Dial-Up estimate the file space
Networking usage—space used
under a particular
directory or files on a
file system.
Creating a WAN over
dial-up internet.

98

99

75. DUPS Digital An element, not
Unbundled bundled with a loop
76. DVB- Port or transport facility,
SH Services which provides digital
access to the
77. DX functionality of a
local switching
system.

Digital a system used to
Video deliver IP based
Broadcasting media content and
- Satellite data to handheld
services to terminals, like mobile
Handhelds phones or PDAs, via
satellite. The DVB-
DirectX / SH system was
Direct X designed for
frequencies below 3
GHz, typically in the
S-band.
Microsoft DirectX
software

99

100

78. DXF Drawing used for Macintosh
Interchange graphic files. The
Format standard file-exchange
format for 3-D and
CAD programs.

79. DXI Data A variable length frame-
Exchange based ATM interface
Interface between a DTE and a
special ATM
CSU/DSU. The ATM
CSU/DSU converts
between the variable-
length DXI frames and
the fixed-length ATM
cells.

80. dyld dynamic The library manager for
link editor code in the Mach-O
executable format. The
dynamic link editor is a
dynamic library that
“lives” in all Mach-O
programs on the system.

100

101







1. E Emergency telecom slang.

Phone Phones.

2. E&M recEive and Trunking arrangement
transMit generally used for two-
(or ear and way switch-to-switch or
mouth) switch-to- network
connections. Cisco's
analog E&M interface
is an RJ-48 connector
that allows connections
to PBX trunk lines (tie
lines). E&M also is
available on E1 and T1
digital interfaces.

3. E2E End-to-End Also known as "soup-
to-nuts" it is an
acronym for a sector of
the industry that
specializes in providing
end-to-end solutions.

101

4. EAB Enterprise A collection of
5. EAI Address information about
Book people, departments,
and locations in an
enterprise. Information
about people may
include telephone
numbers, mailing
addresses, and the
department in which a
person works.

Enterprise EAI is a business
application computing term for the
integration plans, methods, and
tools aimed at
modernizing,
consolidating, and
coordinating the
computer applications
in an enterprise.

6.. EAM Event Tivoli Security

Aggregation Operations Manager

Module module

102

7. EAR Emergency usually an internal
8. EASDAQ Assistance request within a
Request company for
technical assistance
by their own support
staff to assist with
an end-user
problem. Most of
these problems are
termed as BUGS by
users and by the
programmers as
undocumented
features.

European An electronic pan-
Association European stock
of exchange founded
Securities by the Belgian
Dealers Banking and
Automated Finance
Quotations Commission,
closely modeled on
103 the NASDAQ
exchange in the
United States. In
2001, NASDAQ
acquired a 58
percent stake in
EASDAQ and

9. EAT End Around Also known as a
10. EAX Test wrap test, returns
output signal to input
11. EB line

Environmental A hardware and
Audio software audio
standard developed
by Creative Labs. It
was originally used
in SoundBlaster
sound boards, and is
supported by other
companies as well
now.

Exabyte This is 2^60 bytes or
1024 petabytes.

12. EBIF Enhanced TV standard under the
Binary SelecTV brand
Interchange announced in early
Format 2010

104

13. E- E-Business Oracle's order
Business
Suite Suite management hubs.

14. EC2 Elastic Amazon EC2 allows
Compute customers to rent
15. ECHS Cloud computers on which
to run their own
Extended computer
Cylinders, applications. EC2
Heads, allows scalable
Sectors deployment of
applications by
105 providing a web
services interface
through which a
customer can create
virtual machines, i.e.
server instances, on
which the customer
can load any
software of their
choice.
Enables use of hard
drives up to 8.4 GB
in size

16. eCI eCommerce A service provider that
17. ECP integrator offers strategy,
marketing, design, and
technical services for
eBusiness. Technical
services are custom
development, commerce
package
implementation, and
application integration,
not hosting or network
services.

electronic The electronic
check presentation of check
presentment data to processing
banks. In the first ECP
phase, one bank
presents a second bank
with electronic check
information based on
the check's MICR line,
which states the correct
customer account and
the amount of the
payment.

106

18. ECS Extended An industry
Character acronym for a
19.. Enterprise Set specialized
Computer ASCII character
Telephony Application- set. The main
Forum to- differences are in
Application the control
20. edress characters and the
e-mail decimal character
address representations of
decimal 128-255.
Brings together
the best industry
thinkers on the
planet to deliver
on a shared
vision in the
computer
telephony
industry to allow
for open access to
a diversity of
communications
products and
services.
edress

107

21. EDS Electronic A multibillion-
22. EGL Data Systems dollar system
23. EGNOS integration and IT
services firm,
founded in 1962
and headquartered
in Plano, Texas.
Acquired by HP.

Enterprise A high-level
Generation language that
Language allows developers
to focus on
European business logic as
Geostationary they create
Navigation complex business
Overlay applications for
Service deployment in any
of several
environments,
including the Web.
a satellite based
augmentation
system developed
by the European
Space Agency.

108

24. EGP Exterior A reachability routing
25. EHR Gateway protocol used by
Protocol gateways in a two-level
26.. EIRP internet. EGP is used in
. Electronic the Internet core
Health system.
Record n electronic record of
health-related
Effective information on an
Isotropic individual that
Radiated conforms to nationally
Power recognized
interoperability
standards and that can
be created, managed,
and consulted by
authorized clinicians
and staff across more
than one health care
organization.
The effective power
radiated from a
transmitting antenna
when an isotropic
radiator is used to
determine the gain of
the antenna

109

27. EJB Enterprise A component
28. EKTS JavaBeans architecture defined by
Sun Microsystems for
electronic the development and
key deployment of object-
telephone oriented, distributed,
set enterprise-level
applications

Any key telephone
with a built-in
microprocessor which
allows access to PBX-
like features as well as
access to multiple CO
lines and uses two- to
four-pair wiring.

29. ELAN Emulated A logical network
Local Area initiated by using the
Network mechanisms defined

by LANE (LAN
Emulation). This could
include ATM and
legacy attached end
stations.

110

30. ELT extract, load, The process of
31.. EMC and transform extracting data
from one or more
Electromagnetic sources, loading it
Compatibility directly into a
relational database,
and then using the
database engine to
run data
transformations.
capability of
systems or
equipment to be
tested in the
intended
environment at
designed levels of
efficiency without
degradation due to
electromagnetic
interactions

111

32. EMOTICON EMOTion A group of
33. EMR ICON symbols used
to indicate
34. EMV emotions in
email or
newsgroups.

electronic A system used
medical to compile
record computerized
patient
Europay- healthcare
MasterCard- information.
EMRs
V1i1sa2 generally deal
with
information
only in the
form of
document
images or text
formatted for
output to a
printer or video
display.
An emerging
general
payment
standard for
smart cards.

36. ENTL Electronic New electronic
37. ENUM Hire/Termination document used
/Leave of to set up new
Absence staff,
termination, or
leave.

electronic .ENUM is an
numbering / IETF standard
Electronic for mapping the
Number public telephone
Mapping system number address
space into the
DNS.

38. ENX European the
Network communications
Exchange network of the
European
automotive
industry.

113

39. EoS / Ethernet EoS is a set of
EoSDH over protocols which allow
SONET / Ethernet traffic to be
40. EPABX Ethernet carried over
Over SDH synchronous digital
hierarchy networks in
Electronic an efficient and
Private flexible way.Ethernet
Automatic frames which are to
Branch be sent on the SDH
Exchange link are sent through
an "encapsulation"
block to create a
synchronous stream
of data from the
asynchronous
Ethernet packets.
refer to PABX

114

41. EPGs electronic two-way television
42. EPIC program services
guides
43. EPM
44. EPN Explicitly designed to fully
Parallel incorporate all of the
Instruction features of the Itanium
Computing series of processors
from Intel. The
Enterprise uniquely designed
Performance EPIC architecture
Management allows the highest
possible performance
via new levels of
parallelism for
enterprise and
technical applications.
Oracle Fusion release

Extended A remote switching
Port module of a telephone
Network switch. Different
vendors use different
115 names. EPN is specific
to Avaya and Definity
line of PBXs.

45. ePO EPolicy McAfee tool that
46. EPO Orchestrator delivers real-time
information and
application integration
for network, desktop,
and server security

emergency A means of turning off
power off power during an
emergency, referring
usually to a switch.

47. EPOC Electronic A 32-bit operating
Piece of system designed by
Cheese Symbian and written
in C++. It is used in
mobile phones and
PDAs, including
PDAs manufactured
by Psion.

116

48. EPR Electronic designed to allow fast
49. EPS Patient and easy on-line
Record access to each
patient's records in
all areas across the
Hopkins continuum
of care, thus
enhancing patient
care.

Encapsulated Adobe file format for
PostScript graphics and text
supported by several
graphics drawing
applications.

50. ERMS electronic electronic records
51. ERR records management systems
management
systems ERRor

ERRor

117

52. eRX e- a type of computer
Prescribing technology whereby
53. ES- physicians use
IS End System handheld or personal
to computer devices to
54. ESB Intermediate review drug and
System formulary coverage and
to transmit
prescriptions to a
printer or to a local
pharmacy.
The International
Organization for
Standardization's Open
Systems
Interconnection (OSI)
protocol by which end
systems announce
themselves to
intermediate systems.

enterprise ESB brings flow-
service bus related concepts such as
transformation and
routing to a Service-
Oriented Architecture.

118

55. ESCD Extended Setup data that is
56. ESDI System stored in a Plug-and-
Configuration Play-compatible
Data system BIOS. It
consists of the
Enhanced system resource
Small Device requirements of
Interface legacy (non-PNP)
devices, and the last
working
configuration of
Plug-and-Play-
compliant devices.
This was a popular
form of hard drive
and controller
interface before IDE
took over the PC
market.

57. ESE Extensible Stores all active
Storage directory objects
Engine

119

58. ESF Extended A T1 framing format
59. ESG Superframe that uses the framing bit
Format to provide mainte-nance
and diagnostic
Enterprise functions.
Strategy
Group an integrated, full-
service IT analyst and
business strategy firm,
world-renowned for
forward-looking market
intelligence, analysis,
and consulting services
that deliver proven,
measurable results.

60. ESL electronic programmable wireless
shelf labels electronic device that
can be
affixed to store
shelves/shelf channels

120