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A reel-to-reel tape recorder (Sony TC-630), typical of a 1970s audiophile device. Reel-to-reel audio tape recording, also called open-reel recording, is magnetic tape audio recording in which the recording tape is spooled between reels. To prepare for use, the supply reel (or feed reel) containing the tape is placed on a spindle or hub.
Quantum cloning. Quantum cloning is a process that takes an arbitrary, unknown quantum state and makes an exact copy without altering the original state in any way. Quantum cloning is forbidden by the laws of quantum mechanics as shown by the no cloning theorem, which states that there is no operation for cloning any arbitrary state perfectly.
When spread over 20 or more copies, the cost per copy (2 to 4 cents) is close to photocopiers. But for every additional copy, the average cost decreases. At 100 prints, the master cost per copy was only 0.4–0.8 cents per copy, and the cost of the paper printed upon will start to dominate.
Digital Audio Tape. Digital Audio Tape ( DAT or R-DAT) is a signal recording and playback medium developed by Sony and introduced in 1987. [ 1] In appearance it is similar to a Compact Cassette, using 3.81 mm / 0.15" (commonly referred to as 4 mm) magnetic tape enclosed in a protective shell, but is roughly half the size at 73 mm × 54 mm × 10 ...
Cylinder machines of the late 1880s and the 1890s were usually sold with recording attachments. The ability to record as well as play back sound was an advantage of cylinder phonographs over the competition from cheaper disc record phonographs, which began to be mass-marketed at the end of the 1890s, as the disc system machines could be used ...
RCA was slow to produce machines for the home market. They were also slow to license pre-recorded music tapes for home playback. Cost was also an issue, with a single cartridge costing US$4.50 in 1960 ($46 with inflation today) compared to a 1,200 foot (365 m) reel of tape, which cost $3.50 ($36 today). [4]
The double-headed eagle was a main element of the coat of arms of the Russian Empire (1721–1917), modified in various ways from the reign of Ivan III (1462–1505) onwards, with the shape of the eagle getting its definite Russian form during the reign of Peter the Great (1682–1725).
It was the same size and shape as the IIc that came before it, but the 5.25-inch floppy drive had been replaced with a 3 + 1 ⁄ 2-inch drive, the power supply was moved inside the case, and the processor was a fast 4 MHz 65C02 processor that actually ran 8-bit Apple II software faster than the IIGS.