1. Scanner

A scanner is an input device that converts physical documents into digital format. It works similarly to a photocopier, capturing images from paper and transferring them to a computer for storage and further processing.

• Features:

  • Converts printed documents, photos, or illustrations into digital files.
  • Captures images in high resolution for editing or printing.
  • Can handle various types of paper and sizes.

• Types of Scanners:

  1. Flatbed Scanner: Most common, with a flat glass surface for scanning.
  2. Handheld Scanner: Portable, moved manually over the document.
  3. Sheetfed Scanner: Feeds sheets automatically for scanning.
  4. Drum Scanner: High-quality scanning for professional use.
  5. Photo Scanner: Specialized for scanning photographs.

• Characteristics:

  • Capable of scanning film negatives with a transparent media adapter.
  • Can handle low-quality or non-standard-weight paper.
  • Flexible enough to scan both small items and large documents.

2. Barcode Reader

A barcode reader is a device used to scan and interpret barcodes, extracting encoded data using light beams. Commonly used in retail, libraries, and logistics, barcode readers facilitate data entry by scanning instead of typing.

• Features:

  • Reads barcodes printed on goods or documents.
  • Extracts data by shining light beams on barcode lines.

• Characteristics:

  • Auto-start feature: Some scanners start scanning automatically when a card or object is placed.
  • Reading indicators: Provide confirmation that a barcode has been scanned successfully.
  • Easy to use: Hold the device near the barcode to scan it.