# 3 Applications

Application is a set of host items. For example, application 'MySQL
Server' may contain all items which are related to the MySQL server:
availability of MySQL, disk space, processor load, transactions per
second, number of slow queries, etc.

An item may be linked with one or more applications.

Applications are used in Zabbix front-end to group items.

::: noteimportant
Currently a host cannot be linked to different
templates having same application.
:::