El Mogote has an air of increasing permanence: a stack of new wood for building blocks the mud track entering the settlement.

ECONOMIST: Honduras

The tenants track mud on the carpets and scuff the woodwork.

FORBES: Magazine Article

To make a maintenance appointment, does a client need to wait at home for a 6-hour appointment window, have the technician show up late, and track mud through her freshly-cleaned carpet, no wonder she called to argue about the bill.

FORBES: Bringing The Magic Kingdom To Your Customers

We find that tracks left in the mud of river beds are the easiest to track.

BBC: Essex 'lion': Brief guide to tracking big cats

It has been used to coordinate requests for relief efforts, track victims in camps and shelters, and coordinate volunteers in the 2005 Pakistan earthquake, the 2006 mud slide in the Philippines, the 2007 earthquake in Peru and the 2008 earthquake in China.

FORBES: Magazine Article