If your computer suddenly refuses to connect to your scanner -- a scanner you have used in the past without trouble -- restart and see if the problem persists.

Many modern printers can scan photos and documents. While your computer might work with your scanner, you'll get better results with specific apps.

Wedge barcode scanners and serial barcode scanners both connect to a PC to scan barcodes into the system. They do not, however, work the same way and each has advantages and disadvantages. This ...