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10 BASE 2

Also known as cheapernet and thin Ethernet, it is adaptation of the Ethernet standard IEEE 802.3 for Local Area Networks. It consists of 50 ohm coaxial cable (RG-58 A/U) with maximum lengths of 185 meters that operates at 10 Mbps and uses baseband transmission methods. Cables connect with BNC connectors.

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10 BASE 5

Original commercially available variant of Ethernet. Data transfer can reach 10 Mbps via baseband transmission. System consists of coaxial cables with maximum length of 500 meters. Synonyms for 10base5 are ThickWire and ThickNet.

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10 BASE T

Ethernet IEEE 802.3 standard for Local Area Networks. It uses twisted-pair cable with maximum lengths of 100 meters. System operates at 10 Mbps and uses baseband transmission methods. 10Base-T cables connect with RJ-45 connectors. It is also known as Twisted Pair Ethernet.

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100 HZ SCANNING

Speed of the set's refresh rate on TV. Higher refresh rate provides smoother picture and less noticeable motion blur. Image is refreshed 100 times every second.

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16 MM

One of the known film gauges. 16mm represents width of the film. It is generally used for non-theatrical and low-budget movies.

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16 MO

Book in which each paper is folded four times, forming 16 leaves, or 32 pages. Synonym for 16mo is sextodecimo.

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16:9 SWITCHING

Aspect ratio (ratio of width/height) for monitors and laptops. It has width of 16 units and height of 9. 16:9 switching allows you to squeeze the picture vertically.

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18 MO

Book where each sheet is folded to form 18 leaves, or 36 pages. Also known as octodecimo.

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18-ELECTRON RULE

A rule used to predict formula for stable metal complexes. Valence shells of transition metals have 9 orbitals which can accomodate 18 electrons. Metal complex with 18 electrons has electron stability of noble gas.

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21 CENTIMETRE LINE

Electromagnetic radiation spectral line of neutral hydrogen atoms. Fine transitions between states in which the spins of the electron and proton are parallel and antiparallel at frequency of 1420 MHz lead to creation of hydrogen spectral line.

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