Definitions for "Elementary"
Having only one principle or constituent part; consisting of a single element; simple; uncompounded; as, an elementary substance.
Pertaining to, or treating of, the elements, rudiments, or first principles of anything; initial; rudimental; introductory; as, an elementary treatise.
Pertaining to one of the four elements, air, water, earth, fire.
of or being the essential or basic part; "an elementary need for love and nurturing"
ensuing essential except exposition
Keywords:  unskilled, guards, jobs, security
Unskilled jobs, e.g. security guards
In terms of certification and endorsements, Elementary refers to Kindergarten-8th grade, the range covered by the Elementary Education endorsement.
In computational complexity theory, the complexity class ELEMENTARY is the union of the classes in the exponential hierarchy.