Technology terms starting with R

1,106 terms

  1. Revisit Interval The time that elapses between successive observations of an object from a single sensor.
  2. Revocation Withdrawing the protections associated with a patent grant.
  3. Revoke a Certificate To prematurely end the operational period of a certificate effective at a specific date and time.
  4. Rewrite as in "URL rewriting"
  5. REX/TTG Receiver Exciter/Test Target Generator.
  6. RF Abbreviation for replicative form.
  7. rf bandwidth See occupied bandwidth, necessary bandwidth.
  8. rf power margin The amount of transmitter power above that which is computed by the link designer as the minimum required to meet specified link performance.
  9. rf tight Offering a high degree of electromagnetic shielding effectiveness.
  10. RFC River Forecast Center. Centers that serve groups of Weather Service Forecast offices and Weather Forecast offices, in providing hydrologic guidance and is…
  11. RFC (Request for Comments) An official document of the Internet Engineering Task Force (IETF) that specifies the details for protocols included in the TCP/IP family. [Exchange 2007]
  12. RFE Request For Enhancement. Request for change or enhancement to an existing system or application.
  13. RFFEL Radio Frequency Linac .
  14. RFI (1) Request for Issue. (2) Request for Information. (3) Radio Frequency Interference.
  15. RFID See radio frequency identification (RFID).
  16. RFID (radio frequency identification) Technology that uses radio frequencies to identify, track, locate, and manage items See also bar code.
  17. RFL Radio Frequency Linac .
  18. RFLINAC Radio Frequency Linear Accelerator.
  19. RFOG Resonant Fiber Optic Gyro.
  20. RFP Request for Proposal.
  21. RFQ Radio Frequency Quadrupole (Accelerator).
  22. RG (1) Rail Gun. (2) Review Group.
  23. RGB Red, Green, Blue (Video Engineering term).
  24. RGB Color Model A color model based upon representing a color as three components: red, green and blue. See HSB Color Model.
  25. RGC (Routing Group Connector) A connector in Exchange 2000 that connects routing groups to one another. An RGC is uni-directional and can have separate configuration properties (such…
  26. RH Abbreviation for recombinant human.
  27. RH Electronics Radiation Hardened Electronics.
  28. RHD Radiation Hardened Electronics. 249
  29. RHETT II (1) Russian Half Effect Thruster Technology Program. (2) Russian Hall Electric Thruster Test.
  30. rhombic antenna A directional antenna that is composed of long-wire radiators that form the sides of a rhombus, the two halves of which are fed equally in opposite phase…
  31. RHS A cluster software component that provides a communication, monitoring, and processing layer between the Cluster service and one or more clustered…
  32. RI Abbreviation for routing indicator.
  33. RIA Abbreviation for radioimmunoassay.
  34. ribbon cable Any cable constructed as a ribbon with parallel elements. 2. A fiber optic cable in which the optical fibers are held in grooves and laminated within a…
  35. RIBIT Reverse Illuminated Blocked Impurity Transducer.
  36. RICBM Retro Intercontinental Ballistic Missile.
  37. rich-text field A field that can contain text, objects, file attachments, and pictures. Notes users can tell they are in a rich-text field if the status bar at the bottom…
  38. RID The portion of a security identifier (SID) that identifies a user or group in relation to the authority that issued the SID.
  39. Ridge Ending A minutiae point at the ending of a friction ridge, as illustrated below. See also bifurcation, friction ridge.
  40. ridgeline A line representing the intersection or top between opposite slopes. Commonly used as a parcel line.
  41. right shift A "bit shift" that divides a number by some power of 2.
  42. right shift operator The right shift operator (>>) is a bit manipulation operator. It moves the bits in its left operand zero or more places to the right, according to the…
  43. right-hand (or clockwise) polarized wave An elliptically or circularly polarized wave, in which the electric field vector, observed in any fixed plane, normal to the direction of propagation…
  44. right-hand rule Synonym Fleming's rule.
  45. rights See definition for user rights
  46. RIIA Royal Institute of International Affairs (UK).
  47. Rijndael Cryptographic algorithm specified in the Advanced Encryption Standard (AES).
  48. RIL Repair Items List (ILS term).
  49. RIM Records and information management.
  50. RIM (records and information management) field of management responsible for the efficient and systematic control of the creation, receipt, maintenance, use, and disposition of records, including…
  51. ring In telephony, a signal of specific duration and character that indicates to a user (customer, subscriber) that a calling party is engaged in an access…
  52. ring latency In a ring network, such as a token ring network, the time required for a signal to propagate once around the ring.
  53. ring network See network topology.
  54. ring topology See network topology.
  55. ring transit time See round-trip delay time.
  56. ring trip Removal of an alerting signal in response to a loop closure. [T1.407-1997]
  57. ringaround 1. The improper routing of a call back through a switching center already engaged in attempting to complete the same call. 2.
  58. ringback signal In telephony, a signal, usually consisting of an audio tone interrupted at a slow rate, provided to a caller to indicate that the called-party instrument…
  59. ringback tone Synonym audible ringing tone.
  60. ringdown In telephony, a method of signaling an operator in which telephone ringing current is sent over the line to operate a lamp and cause the drop of a…
  61. ringdown circuit In telephony, a circuit in which manually generated signaling power is used to perform ringdown.
  62. ringdown signaling In telephony, the application of a signal to a line (a) to operate a line signal lamp or a supervisory signal lamp at a switchboard or (b) to ring a…
  63. ringer equivalency number (REN) A number determined in accordance with the Code of Federal Regulations, Title 47, part 68, which number represents the ringer loading effect on a line.
  64. ringing Oscillations that occur in the output of systems after a sudden change in the input. [T1.646-1995]
  65. ringing cycle In traditional telephony, a nominal period (usually approximately 6 seconds) composed of alternate (a) ringing signals (ringing current) and (b) a silent…
  66. ringing signal 1. The alternating current (ac) component of the alerting signal. [T1.401-1988] [T1.407-1990] 2.
  67. RINT Unintentional Radiation Intelligence.
  68. RIP The procedures used to unbundle email collections into individual emails during the e-discovery process while preserving authenticity and ownership.
  69. rip cord Of an optical cable, a parallel cord of strong yarn that is situated under the jacket(s) of the cable for the purpose of facilitating jacket removal…
  70. ripple voltage In a dc voltage, the alternating component that is residually retained from rectification of ac power, or from generation and commutation. 2.
  71. RIS Radar Instruction Set Computer.
  72. RISC Reduced Instruction Set Computers.
  73. RISCAE RISC Ada Environment.
  74. rise time In the approximation of a step function, the time required for a signal to change from a specified low value to a specified high value.
  75. Risk The possibility of loss; the uncertainty of future returns.
  76. risk acceptance A managerial decision to accept a certain degree of risk, usually for technical or cost reasons. [2382-pt.8]
  77. risk analysis A process consisting of three components: risk assessment, risk management and risk communication performed to understand the nature of unwanted, negative…
  78. Risk Approval Authority (RAA) An individual designated by the Director, MDA who makes risk acceptance decisions.
  79. risk assessment a scientifically based process consisting of the following steps: i) hazard identification; ii) hazard characterization; iii) exposure assessment; and iv)…
  80. risk index [The] difference between the minimum clearance or authorization of information system (IS) users and the maximum sensitivity (e.g.
  81. risk management The process, distinct from risk assessment, of weighing policy alternatives, in consultation with all interested parties, considering risk assessment and…
  82. Risk Mitigation Risk mitigation involves prioritizing, evaluating, and implementing the appropriate risk-reducing controls recommended from the risk assessment process.
  83. Risk Tolerance The degree to which you are willing to risk losing some (or all) of your original investment in exchange for a chance to earn a higher rate of return.
  84. RISTA Reconnaissance, Intelligence, Surveillance, and Target Acquisition.
  85. RIU Range Interface Unit.
  86. RIVET JOINT Name of USAF Reconnaissance project.
  87. RIW Reliability Incentive Warranty.
  88. RJ Abbreviation for registered jack.
  89. RJE Abbreviation for remote job entry.
  90. RL Rome Laboratory, Griffiss Business and Technology Park, NY. (Formerly called Rome Air Development Center.)
  91. RLA Repair of Level Analysis (ILS term).
  92. RLG Ring Laser Gyro.
  93. RLRIU Routing Logic Radio Interface Unit (PATRIOT).
  94. RLRIU-U Routing Logic Radio Interface Unit Upgrade (USA term).
  95. RLS attribute Descriptive information that may be associated with a logical or target name mapping registered in a Local Replica Catalog (LRC).
  96. RM Radioman (USN term). 250
  97. RM (records management) See records and information management (RIM).
  98. RMA (1) Reliability, Maintainability and Availability (see RAM) (ILS term). (2) Revolution in Military Affairs (OSD term).
  99. RMCET Resource Management Concurrent Engineering Team.
  100. RME (1) Relay Mirror Experiment (a satellite launched February 1990 and which reentered the atmosphere in May 1993). (2) Remote Multiplexer Encoder.