Technology terms starting with A

1,579 terms

  1. ATMD Army Theater Missile Defense.
  2. ATMDF Air and Theater Missile Defense Force (US Army term).
  3. ATMDPO Army Theater Missile Defense Program Office.
  4. atmospheric duct A horizontal layer in the lower atmosphere in which the vertical refractive index gradients are such that radio signals (a) are guided or focused within…
  5. atmospheric noise Radio noise caused by natural atmospheric processes, primarily lightning discharges in thunderstorms.
  6. ATO authority to operate
  7. ATOC Air Tactical Operations Center.
  8. ATODB Air Tasking Order Database.
  9. Atom A particle of matter indivisible by chemical means. It is the fundamental building block of elements.
  10. atomic Refers to an operation that is never interrupted or left in an incomplete state under any circumstance.
  11. atomic operation When Democritus gave the word "atom" to the indivisible bits of matter, he meant literally something that could not be cut: a- (not) + tomos (cuttable).
  12. atomic time See International Atomic Time.
  13. ATOW Acronym for acquisition and tracking orderwire. A downlink circuit that provides a terminal with information regarding uplink acquisition and…
  14. ATP A substance present in all living cells that provides energy for many metabolic processes and is involved in making RNA.
  15. ATP&FC Acquisition, Tracking, Pointing, and Fire Control.
  16. ATR Autonomous/Automated Target Recognition.
  17. ATRJ Advanced Threat Radar Jammer.
  18. Atropos One of the CPU schedulers provided by Xen. Atropos provides domains with absolute shares of the CPU, with timeliness guarantees and a mechanism for…
  19. ATSIM Acquisition and Track Simulation.
  20. attach To store a file with a Lotus Notes document or form. The file, or attachment, is stored with the document or form in the application until one of them is…
  21. Attachment Taking a person's property to satisfy a courtordered debt.
  22. attachment unit interface (AUI) In a local area network, the interface between the medium access unit (MAU) and the data terminal equipment within a data station.
  23. Attachments Any file type associated with or attached to an e-mail.
  24. attack An attempt to violate computer security. Note: An example of an attack is malicious logic. [2382-pt.8] 2.
  25. Attack and Launch Early Reporting to Theater (ALERT) An upgrade to ground station mission processing which exploits inherent satellite capability to provide theater missile warning and cueing. 25
  26. Attack Assessment (AA) An evaluation of information to determine the potential or actual nature and objectives of an attack for the purpose of providing information for timely…
  27. Attack Characterization The process by which the parameters of an attack in progress are developed, updated and defined.
  28. Attack Operations (Counterforce) Attack operations prevent launch of theater missiles by attacking all elements of the overall enemy system, including such actions as destroying launch…
  29. Attack Price A concept used to evaluate the performance of a BMD system that defines price as the number of Re-entry Vehicles required to ensure target destruction.
  30. Attack Signature A specific sequence of events indicative of an unauthorized access attempt.
  31. attack time The time between (a) the instant that a signal at the input of a device or circuit exceeds the activation threshold of the device or circuit and (b) the…
  32. Attack Warning/ Attack Assessment (AW/AA) Integrated air, missile, and space defense data used to determine whether an attack is underway and, if so, what is the type and strength of the attack.
  33. ATTD Advanced Technology Transition Demonstration.
  34. Attempt The submission of a single set of biometric sample to a biometric system for identification or verification.
  35. attendant access loop A switched circuit that provides an attendant with a manual means for call completion and control.
  36. attendant conference A network-provided service feature that allows an attendant to establish a conference connection of three or more users.
  37. attendant position The part of a switching system used by an attendant, i.e., an operator, to assist users in call completion and use of special services.
  38. attention character In [a] trusted-computing-base (TCB) design, a character entered from a terminal that tells the TCB the user wants a secure communications path from the…
  39. attention signal The attention signal to be used by AM, FM, and TV broadcast stations to actuate muted receivers for inter-station receipt of emergency cuing announcements…
  40. Attenuation A mechanism for controlling gene expression in prokaryotes that involves premature termination of transcription.
  41. attenuation coefficient The rate of diminution of average power with respect to distance along a transmission path.
  42. attenuation constant The real part of the propagation constant in any electromagnetic propagation medium.
  43. attenuation distortion The difference in loss at specified frequencies relative to the loss at 1004 Hz, unless otherwise specified. [NECA/FCC-5]
  44. attenuation rate Synonym attenuation coefficient.
  45. attenuation-limited operation The condition that prevails when attenuation, rather than bandwidth, limits the performance of a communications link.
  46. attenuator A nucleotide sequence in the 5' region of a prokaryotic gene (or in its RNA ) that causes premature termination of transcription, possibly by forming a…
  47. attractiveness The property or properties of a location that create an incentive for trips to be made to that location.
  48. attribute An attribute is a characteristic of data that sets it apart from other data, such as location, length, or type.
  49. Attribute Authority An entity, recognized by the Federal Public Key Infrastructure (PKI) Policy Authority or comparable Agency body as having the authority to verify the…
  50. attribute certificate A set of attributes and a public key certificate identifier that are made unforgeable by use of the digital signature created with a private key.
  51. attribute data Characteristic or descriptive information about a geographic feature (points, lines, or areas) stored in either tabular format or relational format.
  52. attribute table / DBMS table An INFO or other tabular file containing rows and columns. In ARC/INFO, attribute tables are associated with a class of geographic features, such as wells…
  53. Attributes Component describing object class properties.
  54. ATV all-terrain vehicle.
  55. audible Synonym for audible ringing tone.
  56. audible ringing An audible signal (information tone) transmitted to the calling party when the called party is alerted. [T1.401-1988]
  57. audible ringing tone In telephony, a signal, usually consisting of an audio tone interrupted at a slow repetition rate, provided to a caller to indicate that the called-party…
  58. Audiences Groups of users, who meet certain criteria, created for targeted distribution of information.
  59. audio channel A means for delivering audio signals from one point to another. An audio waveform submitted to the channel input results in a similar (not necessarily…
  60. Audio Codec The digital encoding used to represent audio data. [Exchange 2007]
  61. audio dubbing 1. In videotape editing, a process or technique employed to (a) enhance (e.g., remove noise from, or introduce some kind of special effect into), (b) add…
  62. audio frame A presentation unit of the audio channel; a group of consecutive audio samples.
  63. audio frequency (AF) The band of frequencies (approximately 20 Hz to 20 kHz) that, when transmitted as acoustic waves, can be heard by the normal human ear.
  64. audio response unit (ARU) A device that provides synthesized voice responses to dual-tone multifrequency signaling input by processing calls based on (a) the call-originator input…
  65. audio-follow-video A video recording, mixing or switching technique or process in which the audio signal associated with any given video signal is recorded, switched, or…
  66. audiovisual records Program and information motion pictures, still pictures, sound recordings, video recordings, and related documentation.
  67. Audit An audit is a professional, independent examination of a company's financial statements and accounting documents following generally accepted accounting…
  68. Audit Data Chronological record of system activities to enable the reconstruction and examination of the sequence of events and changes in an event.
  69. audit event An activity which may cause an audit record to be reported in an audit trail. The POSIX.6/D13.1 option specifies the audit events corresponding to POSIX.
  70. audit event type A field within an audit record that identifies the activity reported by the record, and defines the required content of the record [POSIX.6].
  71. audit ID >An identifier for the individual user accountable for an audit event [POSIX.6].
  72. audit information >Information recording security events in the system [ECMA138].
  73. audit record The discrete unit of data reportable in an audit trail on the occurrence of an audit event [POSIX.6].
  74. audit record field A field containing information regarding all entities in a transaction, and indicators of the types of processing performed by those entities. [After X9.
  75. audit recorder function >A function that records the security-relevant messages in a security audit trail [10181-7].
  76. Audit Reduction Tools Preprocessors designed to reduce the volume of audit records to facilitate manual review.
  77. audit review file A file created by executing statements included in a computer program for the explicit purpose of providing data for auditing.
  78. Audit Trail In computer security systems, a chronological record of when users logged in, how long they were engaged in various activities, what they were doing, and…
  79. audit trail analyzer function >A function that checks a security audit trail in order to produce, if appropriate, security alarm messages [10181-7].
  80. audit trail archiver function A function that archives a part of the security audit trail [10181-7].
  81. audit trail collector function A function that collects individual audit trail records into a security audit trail [10181-7].
  82. audit trail examiner function >A function that builds security reports out of one or more security audit trails [10181-7].
  83. audit trail provider function A function that provides security audit trails according to some criteria [10181-7].
  84. AUI Abbreviation for attachment unit interface.
  85. AULS Accidental or Unauthorized Limited Strike.
  86. AUPC Average Unit Procurement Cost.
  87. Aurora A display of colored light in the atmosphere, caused by collisions between charged particles from a planet’s magnetosphere and atmospheric gases near…
  88. authentic copy A copy of documentary material for which the official custodian attests the authenticity.
  89. authentically preserve To maintain documentary material over time in such a manner that its identity is unquestionable and it is not corrupted.
  90. Authenticate To confirm the identity of an entity when that identity is presented.
  91. authenticated identity >An identity of a principal that has been assured through authentication [10181-2].
  92. Authenticated Internet Protocol A protocol extension to Internet Key Exchange (IKE) that supports additional authentication mechanisms and the combination of user and computer…
  93. Authenticated IP A protocol extension to Internet Key Exchange (IKE) that supports additional authentication mechanisms and the combination of user and computer…
  94. authentication The process of validating the credentials of a person, computer process, or device.
  95. authentication algorithm An encryption process or tool in which the results of text encryption depend on all relevant authentication elements. [After X9.24]
  96. authentication authority An authority recognized in a security domain as a source of certified identities.(See also Subject Authority) [ECMA138].
  97. authentication certificate Authentication information in the form of a security certificate which may be used to assure the identity of an entity guaranteed by an authentication…
  98. Authentication Code A cryptographic checksum based on an Approved security function (also known as a Message Authentication Code (MAC)).
  99. authentication element A contiguous group of characters or bits that are corruption-protected by being processed by the authentication algorithm. [After X9.24]
  100. authentication exchange 1. A mechanism intended to ensure the identity of an entity by means of an information exchange. [2382-pt.8] 2.