If physical paper document scanning is absolutely required,
a portable scanner like the Pentax DS Mobile 600, or Xerox Travel Scanner 100 suffice to generate PDF files from relatively small multi-page paper documents collected in the field.
Not exact matches
Depending on the needs of your practice area, you may also want a
portable scanner or one that can scan 3 - D objects
like books or small physical exhibits.
You will want to catalog each item
like your desktop or laptop computer, home office equipment
like document
scanner or printer, iPod or
portable music player, television, DVD player, video game system, and speakers and audio system.