Part of doing physics research involves reading scientific papers. Typically the papers are printed out to read later. Sometime if I am working on a specific project I will have a bunch of papers. After a while I end up with a big pile of papers in my office and in my flat. I do sometimes file things away. Many papers are printed off multiple times, because I can't always find the paper I need to read.
The most "famous" place with big piles of papers was John Ellis's office in CERN.
I have taken a number of papers with me to conferences for reference. But a big collection of papers is heavy and it is not so easy to read them on a plane.
There are some very good tools to collect papers online. For example I use citeulike.
I can't help feeling that both me and John Ellis need to be able to read and organize physics papers on a tablet or on the kindle. In later posts I will see what can be done with today's tablets.