Estonia has had a great deal of experience in combining different information systems into a common exchange system. We have successfully implemented the secure X-road data exchange layer which today includes the services of over eighty databases. 
The ID-card is the primary identity document. It is used to identify persons not only in the physical world but also in electronic environments.
As an alternative to the ID-card, Estonia has developed an infrastructure for the Mobile ID-card.
For the reorganisation of public sector geoinformation systems (GIS), the Public Sector Infra- structure for Spatial Information, which is based on OpenGIS standards, is being elaborated.
he banking sector plays a major role in the development of the e-State in Estonia.
Pursuant to Estonian legislation, public sector organisations are required to have an electronic system of document management.
One of the main objectives of any country is probably to guarantee stability and security.
In the Parliamentary Elections of March 2007, Estonian electors were among the first in the world to have the opportunity of casting their vote either over the Internet or via a traditional voting booth.
Several countries which levy personal income tax and other taxes have created an electronic tax board as a function of their e-State.
