# Concepts and definitions
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This section describes key concepts and defines terminology specific to this solution:

 **schedule** 

Group of one or more periods that an instance is bound by.

 **period** 

Running period(s) defined by a start and stop time.

 **instance** 

A supported resource that is able to be scheduled. For example, an Amazon EC2 instance or an Amazon RDS cluster Amazon EC2 and Amazon RDS.

 **regular business hours** 

9:00 to 17:00 (9 AM - 5 PM) ET on weekdays

For a general reference of AWS terms, see the [AWS Glossary](https://docs.aws.amazon.com/general/latest/gr/glos-chap.html).