7cc0e581_ared_Version_2_1_on_MS_Windows__Meaning
[Operator] = [Condition is satisfied if...] ... the content of the field is identical to the indicated expression. The operator = will not be displayed in the query fields. If you enter a value without any operator, the operator = will be automatically adopted. [Meaning] 
equal to
e q u a l t o
n o t e q u a l t o
g r e a t e r t h a n
l e s s t h a n
g r e a t e r t h a n o r e q u a l t o
l e s s t h a n o r e q u a l t o