RS-232 - Standard type of serial data interconnection available on most PC type computers. It is the slowest way to transfer image data from a camera.
RS-232
Standard Serial Port on most PC computers. The majority of post-2001 digicams don't have this type of connection any more - it's too slow compared to USB.
SD ...
Serial port A port on the computer (RS-232) where the wires carry the information in a serial manner - (speed is usually low but it is some kind of the lowest denominator in computer communication).
A serial communication port which support the RS-232 standard of communication.
Compression
The process of reducing the size of a file. Compression is either lossless or lossy.
Most serial ports on personal computers conform to the RS-232C or RS-422 standards. A serial port is a general-purpose interface that can be used for almost any type of device, including modems, mice, and printers ...
It is now widely used for scanners, digital cameras and CD-R drives, all devices that require transferring a large amount of data to the computer. SCSI is faster than RS-232-C, but is still obsolete when compared to the USB interface.
 See also: Light, Speed, Data, Media, Aperture
  
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