Technological partitioning

Technological partitioning identifies and separates
the different software responsibilities for each
domain partition. Each technological partition will
typically address one type of software functionality,
such as 

user interface design, 
application logic,
transaction management, or 
data persistence and access. 

In turn, the nature of each type of
technological functionality will usually call for a
different type of programming and different
technologies. For example, data access implies the
ability to communicate with files or databases and
the need to select an appropriate database. User
interface design implies graphical interface elements
and event management.