Many many things about document scanner
While any document scanner performs the same basic function, there are some that are designed for a specific document formats while others can accommodate a wider variety of formats. Some document scanners are even used solely for scanning business cards. An important factor to take into consideration when shopping for a document scanner is its image resolution, If you plan to use your document scanner mainly for filing text or less sensitive graphic documents, you can make do with a document scanner that has a resolution of 600 dpi or less. For most uses that don't require too much detail, this resolution is generally more than enough. In some cases, you will need a document scanner with a much higher resolution.