The hobby of collecting includes seeking, locating, acquiring, organizing, cataloging, displaying, storing, and maintaining whatever items are of interest to the individual collector. The scope of collecting is unlimited: "If something exists, somebody somewhere collects them.
The most obvious way to categories collections is by the type of objects collected. Most collections are of manufactured commercial items, the subject of a collection. Among collections of manufactured items, the objects may be antique, or simply collectible. Antiques are collectible items at least 100 years old.
Collecting is for some people a childhood hobby, but for others a lifelong pursuit or one that begins in adulthood. Collectors who begin early in life often modify their aims when they get older. Some novice collectors start purchasing items that appeal to them then slowly work at learning how to build a collection, while others prefer to develop some background in the field before starting to buy items.
The emergence of the internet as a global forum for different collectors has resulted in many isolated enthusiasts finding each other.