The years of service for which a WRS participant has received credit under the WRS. This includes all service for which contributions have been made, purchased service and any retirement service credit granted by the employer prior to the date the employer joined the WRS.

Periods of employment that are either earned, claimed, or purchased. This is used to determine both eligibility for retirement benefits and the amount of these benefits

Service for which retirement credit is earned through paid employment in a regularly established position with an employer participating in the FRS Pension Plan, as well as any additional service that may be credited under the plan. (The term may also be used to refer to service for which retirement credit is earned under any other defined benefit plan, such as one of the closed retirement systems.)