Technology terms starting with R

1,106 terms

  1. raster scanning Scanning in which the motion of the scanning spot follows a raster.
  2. Rate Area Denotes the smallest geographic area used to distinguish rate boundaries.
  3. Rate Center A geographically specified point used for determining mileage-dependent rates for PSTN calls. It is defined by a set of Vertical & Horizontal coordinates.
  4. rated output power That power available at a specified output of a device under specified conditions of operation. Note: Rated output power may be further described; e.g.
  5. Rating Rating means evaluating a company, security, or investment product to determine how well it meets a specific set of objective criteria.
  6. ratio-squared combiner Synonym maximal-ratio combiner.
  7. Rationalization Any action that increases the effectiveness of allied forces through more efficient or effective use of defense resources committed to the alliance.
  8. ray A geometric representation of a lightwave by a line normal to the electromagnetic wavefront; i.e., in the direction of propagation of the wave. [FAA]
  9. ray optics Synonym geometric optics.
  10. Rayleigh distribution A mathematical statement, usually applied to frequency distributions of random variables, for the case in which two orthogonal variables are independent…
  11. Rayleigh fading In electromagnetic wave propagation, phase-interference fading caused by multipath, and which may be approximated by the Rayleigh distribution.
  12. Rayleigh Scattering Changes in directions of electromagnetic energy by particles whose diameters are 1/16 wavelength or less.
  13. RB Reentry Body.
  14. RBECS Revised Battlefield Electronic CEOI System (US Army-sponsored).
  15. RBL (real-time block list) A database of Internet Protocol (IP) addresses of sources that have been verified as being unsolicited commercial e-mail (also known as spam).
  16. RBO Radio Blackout.
  17. RBOC Acronym for Regional Bell Operating Company.
  18. RC/CC Responsibility Center/Cost Center.
  19. RCC Abbreviation for radio common carrier.
  20. RCF Radar Correlation Function.
  21. RCM (1) Reliability Centered Maintenance. (2) Requirements Correlation Matrix (AF). (3) Resource Consumption Model.
  22. RCR Rate Capability Review (USA term).
  23. RCS Radar Cross-Section.
  24. RCSR Radar Cross-Section Reduction.
  25. RCSS Range Command Safety System.
  26. RCU (1) Rate Changes Unit. (2) Remote Control Unit. (3) Reactor Control Unit.
  27. RCVR Receiver.
  28. RD Readiness Demonstrator (SBL Program term).
  29. RDA Research, Development and Acquisition.
  30. RDBMS Relational Database Management System (Computer term).
  31. RDC Research and Development Contract.
  32. RDD Requirements Driven Design. 244
  33. RDD-100 Requirements Driven Development
  34. RDF Resource Description Framework. An XML-based language for describing online resources.
  35. RDF Graph Set of RDF triples.
  36. RDF schema A standard for specifying consistency rules that apply to the specifications contained in an RDF.
  37. RDF Subgraph A subset of the triples in the graph.
  38. RDF Triple see Triple.
  39. RDFS Resource Description Framework Schema.
  40. RDG ridge
  41. RDM (Raw Device Mapping) A mechanism that enables a virtual machine to have direct access to a LUN on the physical storage subsystem (Fibre Channel or iSCSI only).
  42. RDN See definition for: Relative Distinguished Name (RDN)
  43. RDS Radius
  44. RDT&E Research, Development, Test, and Evaluation.
  45. RDT&E Program Categories The five divisions the comprise Major Force Program 06 (R&D) in the FYDP. They are: • 6.1 Basic Research • 6.2 Exploratory Development • 6.
  46. RE reexamination
  47. Re Targeting The ability of the system to recomputed the direction of sensors and/or weapons to intercept a target that was missed on the first attempt, or that was…
  48. Re-key (a certificate) To change the value of a cryptographic key that is being used in a cryptographic system application; this normally entails issuing a new certificate on…
  49. Re-submission Repeating the search engine registration process one or more times for the same page or site.
  50. Reach Any specified length of stream, channel, or other water conveyance. A portion of a stream or a river.
  51. REACT Rapid Execution and Combat Targeting.
  52. Reaction Decoy A decoy deployed only upon warning or suspicion of imminent attack.
  53. read 1. [A] fundamental operation in an information system (IS) that results only in the flow of information from an object to a subject. [INFOSEC-99] 2.
  54. read access 1. In computer or data processing technology, the privilege (or capability) of reading electronically the information in a file or data base, without the…
  55. read access list A list that restricts a form so that only specified users can read documents created from the form.
  56. read head A magnetic head capable of reading only.
  57. read replica An active copy of another DB instance. Any updates to the data on the source DB instance are replicated to the read replica DB instance using the built-in…
  58. read-only Pertaining to data that can be read but cannot be modified.
  59. read-only access See read access.
  60. read-only domain controller A domain controller that has read-only copies of directory partitions.
  61. read-only memory (ROM) 1. A memory in which data, under normal conditions, can only be read. Synonym nonerasable storage.
  62. read-only storage A storage device in which the contents cannot be modified, except by a particular user, or when operating under particular conditions, e.g.
  63. read/write opening Synonym read/write slot.
  64. read/write slot An opening in the jacket of a diskette to allow access to the read/write heads. Synonym read/write opening.
  65. readable With respect to files, one that has the proper permission bit set to let you access the file.
  66. reader A user who can search for and read documents but cannot add them to the workspace. By default, all folder users have reader permissions.
  67. reader access An access level with which users can only read documents.
  68. Reader class A sub class of the Reader abstract, defined in the java.io package. Reader classes translate input from a host-dependent character set encoding into…
  69. reader server The component of a news server that obtains the data that the news cache requests from the news storage device.
  70. Readiness Postures A specific status defining the relative responsiveness of BMD assets and personnel to perform a USSPACECOM BMD mission.
  71. reading The acquisition or interpretation of data from a storage device, from a data medium, or from another source.
  72. reading file See convenience file.
  73. ready-for-data signal A call-control signal that is transmitted by the data circuit-terminating equipment (DCE) to the data terminal equipment (DTE) to indicate that the…
  74. real number A number with an integer and a fractional part. The primitive types double and float are used to represent real numbers.
  75. real numbers Decimal numbers (e.g., 3.1417, 0.25, 1.8992, 6.0).
  76. real power See effective power.
  77. Real Time When an event is reported as it happens - such as a quick jump in a stock's price or the constantly changing numbers on a market index - you are getting…
  78. Real Time (R-T) 1. Pertaining to the timelines of data or information which have been delayed only by the time required for electronic communication.
  79. real time call establishment procedures A set of on-demand procedures based on which the communication can be started in relatively short time (i.e.
  80. Real Time Streaming Protocol (RTSP) An open standard for delivery of real-time media over the Internet.
  81. Real World Data Data derived from physical experimentation concerning phenomenology associated with technical functioning of SDS, particularly regarding target…
  82. Real World Data Collection The provision, to SEIC users, of access to real world data, in fashion timely and otherwise suitable to meet users needs (e.g.
  83. Real-time Indexing The ability to index content with short latency, typically within seconds from when the enterprise search platform receives a document for indexing.
  84. real-time reaction [In INFOSEC, the] immediate response to a penetration attempt that is detected and diagnosed in time to prevent access. [INFOSEC-99]
  85. Real-time Transport Control Protocol (RTCP) A feedback protocol that provides QoS information to the streaming server. The RTCP feedback mechanism periodically describes the state of the network so…
  86. Real-time Transport Protocol (RTP) An Internet protocol for the transmission of real-time data, including voice and video.
  87. realm A server(s) that hosts a copy of the game. Each and every realm is distinct and seperate from all others and there are completely no interactions between…
  88. reaping The last rites performed by a parent "process" on behalf of a deceased child process so that it doesn't remain a "zombie".
  89. reasonable assurance A high degree of confidence by an individual, entity, or application that received data should be treated as valid and unaltered. [After X9.30-1]
  90. reasonableness check A test to determine whether a value conforms to specified criteria. Note: A reasonableness check can be used to eliminate questionable data points from…
  91. Reasoner One of the main services offered by a reasoner is to test whether or not one class is a subclass of another class.
  92. reattach An action that re-establishes the communication with a participant of the conference. [T1.647-1995]
  93. REC Radio-Electronic Combat.
  94. Recall For a query, recall means the ability to retrieve as many documents as possible that match or are related to a query.
  95. RECCE Reconnaissance.
  96. receipt handle An identifier you get when you receive a message from the queue. This identifier is required to delete a message from the queue or when changing a…
  97. Receive connector A connector that is used to receive mail from remote mail systems based on administrator-defined address spaces.
  98. receive loudness rating (RLR) See receive objective loudness rating.
  99. receive objective loudness rating (ROLR) The ratio in dB of the voltage entering a loop and telephone to the sound pressure produced by the telephone's receiver. [After T1.255-1997]
  100. receive only (RO) Pertaining to a device or a mode of operation capable of receiving messages, but not of transmitting messages.