What does the acronym ZIF stand for?

What does the acronym ZIF stand for?

• Zero Incident Frequency
• Zero Interesting Facts
• Zero Insertion Force
• Zero Intermediate Frequency 

EXPLANATION

ZIF. Stands for "Zero Insertion Force." ZIF is a type of CPU socket on a computer motherboard that allows for the simple replacement or upgrade of the processor. Processors that use a ZIF socket can easily be removed by pulling a small release lever next to the processor and lifting it out.