The discussion in §§ 779.103 to 779.109 included general reference to types of employees in the retail or service field whose individual activities constitute engagement in interstate or foreign commerce or in the production of goods for such commerce within the meaning of the Act. There are many classes of employees customarily employed by retail or service establishments or enterprises whose individual activities ordinarily constitute engagement in commerce or in the production of goods for commerce within the meaning of the Act. The groups of employees discussed in the following §§ 779.111 to 779.118, are illustrative only. There are other employees whose activities may be covered; also there are other activities performed by the groups discussed which would result in individual coverage under the Act.