The journey log is stored on a standard micro-SD memory card to make it simple to use without any special software.

ECONOMIST: Monitor

Employees of its customer companies log on to the GlobalExpense website, record their expenses on standard forms and put their receipts in the mail.

ECONOMIST: Men and machines

The gold standard of proof is "contemporaneous records" such as time-stamped store receipts or a log.

WSJ: Tax Report: Rules for Renting Out Your Vacation Home