Scanners are classified into three main types: EPP, USB, and SCSI. Their characteristics are as follows: 1. EPP: Its greatest feature is convenience. And now the speed to strengthen the EPP port and USB, SCSI is already very close, so that it is more prominent in its convenience, while the EPP port on the computer requirements are low, more than 486 models can be used. So if your computer is an old motherboard, then choose a scanner with EPP interface is a good choice. 2, USB: Its greatest feature is faster, easy installation, can be hot plug. However, it requires high quality motherboards. First of all, it must support USB. According to tests, if the motherboard does not provide enough power to the USB device, it may cause crashes during scanning. With the increasing popularity of USB applications, USB-based scanners are a trend. 3, SCSI: Its advantage is fast, scanning is stable, occupying less system resources while scanning. The disadvantages are the high cost and the troublesome installation. Nowadays, in addition to the high-end professional scanners, there are fewer and fewer.
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