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 Three-  tier  client–server 

The first tier is the client that 

handles display, second is application logic and business 

rules, third is database storage.

Tipping point 

Using the science of social epidemics 

explains principles that underpin the rapid spread of  

ideas, products and behaviours through a population.

Total cost of ownership (TCO) 

The sum of all cost 

elements of managing information systems for  end-  users 

including purchase, support and maintenance.

Trademark 

A trademark is a unique word or phrase that 

distinguishes your company. The mark can be registered 

as plain or designed text, artwork or a combination. In 

theory, colours, smells and sounds can also be trademarks.