It's non-electronic structured data. If you need mobile data entry, without room or hands to manage a laptop (e.g., you're walking around a lab looking at diffe

It's non-electronic structured data. If you need mobile data entry, without room or hands to manage a laptop (e.g., you're walking around a lab looking at different samples), is there anything as efficient as writing on index cards? (My point is more about the efficiency of mobile UIs than index cards.)