<P> Other non-managerial positions in the USPS include: </P> <Ul> <Li> Maintenance and custodians, who see to the overall operation and cleaning of mail sorting machines, work areas, public parking and general facility operations . </Li> <Li> City Carrier Assistants . (CCA's) With the Das Arbitration award the designation of PTF City Carrier has been abolished . TE City Carriers will have the opportunity to become CCA's . A CCA is a non-career employee who is hired for a 360 - day term, similar to what TE's had . CCA's earn annual leave . CCA's, unlike TE's do have a direct path to becoming career employees . When excess City Carrier positions exist the CCA in that work installation with the highest "relative standing" will be promoted to a career employee and be assigned to the vacant position . </Li> <Li> Career, Part Time Flexible and Transitional employees (Career, PTF & TE) There are a variety of other non-managerial positions in such crafts as accounting, information technology, and the remote encoding center . These are under a different contract than plant workers or mail carriers . </Li> </Ul> <Li> Maintenance and custodians, who see to the overall operation and cleaning of mail sorting machines, work areas, public parking and general facility operations . </Li> <Li> City Carrier Assistants . (CCA's) With the Das Arbitration award the designation of PTF City Carrier has been abolished . TE City Carriers will have the opportunity to become CCA's . A CCA is a non-career employee who is hired for a 360 - day term, similar to what TE's had . CCA's earn annual leave . CCA's, unlike TE's do have a direct path to becoming career employees . When excess City Carrier positions exist the CCA in that work installation with the highest "relative standing" will be promoted to a career employee and be assigned to the vacant position . </Li>

Of what is the united states postal service an example