Give the person your full attention.
Not sure how this has to do with Health but my answer would be to not buy things online at all. Nowadays it's EXTREMELY easy to get robbed of your money, by people that live across the world. Your bank account can easily be accessed through a phone, computer, gaming system, credit/debit card, check book, etc. I covered things both online and off. Stay safe!
ICD-10-CM/PCS this will help you
Who uses topography maps?
Hikers, campers, snow skiers, city and county planners, the Fish and Wildlife Service, Forest Service, miners, loggers, highway planners and construction workers, travelers, surveyors, geologists, engineers, and scientists are just a few of the people who use topographic maps. Knowing the shape of the terrain enables a hiker to plan a hike. Highway planners determine the best routes for highways knowing the cut and fill areas. Surveyors locate benchmarks, and geologists locate their actual positions relative to the map and can determine if changes to the land have occurred.