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2. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Evaporator, indoor unit, or terminal, side of a ductless split-type air conditioner. Ductless systems (often mini-split, though there are now ducted mini-split) typically supply conditioned and heated air to a single or a few rooms of a building, without ducts and in a decentralized manner. [63]

3. Variable refrigerant flow - Wikipedia

   en.wikipedia.org/wiki/Variable_refrigerant_flow

   Variable refrigerant flow (VRF), also known as variable refrigerant volume (VRV), is an HVAC technology invented by Daikin Industries, Ltd. in 1982. [1] Similar to ductless mini-split systems, VRFs use refrigerant as the primary cooling and heating medium, and are usually less complex than conventional chiller-based systems.

4. Fan coil unit - Wikipedia

   en.wikipedia.org/wiki/Fan_coil_unit

   These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.

5. Microcassette - Wikipedia

   en.wikipedia.org/wiki/Microcassette

   The microcassette was beaten to market by the Mini-Cassette, introduced by Philips in 1967. The mini-cassette is almost identical in appearance and dimensions to the microcassette, however it has thicker cogs for its reels and a slightly wider cassette. The mini-cassette, despite making it to market first, was less successful than the ...

6. Cassette tape - Wikipedia

   en.wikipedia.org/wiki/Cassette_tape

   The cassette was the next step following reel-to-reel audio tape recording, although, because of the limitations of the cassette's size and speed, it initially compared poorly in quality. Unlike the 4-track stereo open-reel format, the two stereo tracks of each side lie adjacent to each other, rather than being interleaved with the tracks of ...

7. Digital Compact Cassette - Wikipedia

   en.wikipedia.org/wiki/Digital_Compact_Cassette

   Philips had developed the Compact Cassette in 1963 and allowed companies to use the format royalty-free, [2] which made it hugely successful but not a significant money-maker. The company saw a market for a digital version of the cassette, and expected that the product would be popular if it could be made compatible with the analog cassette.