relaying system
61Peer-to-peer — Not to be confused with point to point. This article is about peer to peer computing. For other uses, see Peer to peer (disambiguation). A peer to peer system of nodes without central infrastructure …
62Telephone exchange — A telephone operator manually connecting calls with cord pairs at a telephone switchboard. In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central… …
63Semaphore line — This article is about the communication system using towers with pivoting shutters. For other uses, see Semaphore (disambiguation). For the now closed railway in Adelaide, Australia, see Semaphore railway line, Adelaide. A Chappe telegraph at… …
64B-47 Stratojet — Infobox Aircraft name=B 47 Stratojet type=Strategic bomber manufacturer=Boeing caption=Boeing B 47E 65 BW (AF Serial No. 51 5257) during rocket assisted takeoff test. designer= first flight=17 December 1947 introduced=June 1951 retired=1966, B… …
65Ryan Model 147 — The Ryan Model 147 Lightning Bug was a drone, or unmanned aerial vehicle, developed from the earlier Ryan Firebee target drone series.DevelopmentRyan Model 136 Red Wagon and Lucy LeeIn 1959, Ryan Aeronautical performed a study to investigate how… …
66Top-level domain — TLD redirects here. For other uses, see TLD (disambiguation). A top level domain (TLD) is one of the domains at the highest level in the hierarchical Domain Name System of the Internet.[1] The top level domain names are installed in the root zone …
67Anti-spam techniques — To prevent e mail spam (aka unsolicited bulk email), both end users and administrators of e mail systems use various anti spam techniques. Some of these techniques have been embedded in products, services and software to ease the burden on users… …
68Edwin Howard Armstrong — Edwin H. Armstrong Developed and advanced the utility of FM technology. Born December 18, 1890(1890 12 18) New York, New York U.S …
69Telecommunication — A parabolic satellite communication antenna at the biggest facility for satellite communication in Raisting, Bavaria, Germany …
70F-22 Raptor — Infobox Aircraft name= F 22 Raptor type= Stealth Air superiority fighter national origin = United States manufacturers=Lockheed Martin Aeronautics Boeing Integrated Defense Systems caption= Two F 22 Raptors in column flight formation designer=… …
