grade signal
101Pennsylvania Railroad — Infobox SG rail railroad name=Pennsylvania Railroad logo filename=Pennsylvania Herald.png logo size=100 marks=PRR locale=Chicago and St. Louis to New York City and Washington, DC start year=1846 end year=1968 successor line=Penn Central old gauge …
102United States Army — Department of the Army United States Army Department of the Army Emblem Act …
103Sound card — A Sound Blaster Live! Value card, a typical (circa 2000) PCI sound card. Connects to Motherboard via one of: PCI ISA USB IEEE 139 …
104Toronto subway and RT — A T series train at Sheppard–Yonge station on the Sheppard line …
105materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …
106spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
107United States Air Force — USAF redirects here. For other uses, see USAF (disambiguation). The U.S. Air Force redirects here. For the song, see The U.S. Air Force (song). United States Air Force …
108Crystal oscillator — A miniature 4 MHz quartz crystal enclosed in a hermetically sealed HC 49/US package, used as the resonator in a crystal oscillator. A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal …
1091995 Fox River Grove bus–train collision — Infobox rail accident title= Fox River Grove level crossing accident date= 0710 UTC 5, October 251995 location= Fox River Grove, Illinois coordinates= coord|42|11|49.2|N|88|13|04.0|W| line = Union Pacific/Northwest Line cause= level crossing… …
110Double junction — (left hand running) A double junction is a railway junction where a double track railway splits into two double track lines. Usually, one line is the main line and carries traffic through the junction at normal speed, while the other track is a… …
