(1) SONAR - sound navigation and ranging
(2) CNS - central nervous system
(3) PTFE - poly tetra flouro ethylene
(4) LDL - low density lipoprotein
(5) SARS - severe acute respiratory syndrome
(6) GUT - grand unified theory
(7) BASIC - beginners all purpose symbolic instruction code
(8) BTU - british thermal unit

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jam