Before email we had snail mail, then stamps were indispensible. Email has not completely replaced snail mail. There still many regions that do not have internet services and many people still find letter writing more intimate. Stamps are always in the currency of the issuing country thus we have canadian postge stamp and united states stamp drawn in Canadian and American dollars respectively.Unlike email letter transmission requires one to get to the post office and buy a stamp and stick on the letter before sending it but with email one can do in the comfort of their home. An hobby developed around stamps creating a group called stamp collector.Stamps can fetch alot of money for the owner depending on the age of the stamp, the rarity and what it commemorates. For serious collectors stamp collecting software is indispensible.Other words have developed from stamps for example rubber stamp and date stamp. A rubber stamp is an office tool with a comapny’s details used for various administrative functions and atimes replaces the need of a signature. A date stamp is a rubber stamp with a date which is used to add a date on a document than having to write it by hand.