selection; making a choice; sifting; decision to adopt or reject
right to choose; a say; option
elective subject or course
selective; optional; alternative
multiple choice (e.g. question)
selective system; system that offers choices
elective subject; elective class
choice of nationality; choice of citizenship
selection condition; selection conditions
function preselection capability
negative selection; purifying selection
Switched Virtual Circuit; SVC
coincident-current selection
switched virtual connection; SVC
grade of delivery selection
selected executable test suite
contextually optional element
contextually optional token
entry-information-selection
frequency selective fading
frequency-dependent selection
attribute-value-assertion
selective field protection
inherently optional token
selective abstract; slanted abstract