Match the phrase to its acronym.

1. sound navigation ranging

scuba

2. Zoning Improvement Plan

sonar

3. radio detecting and ranging

SHUD

HUD

4. National Aeronautics and Space Administration

5. Housing and Urban Development

NASA

2 ZIP

radar

3

6. self-contained underwater breathing apparatus

Sound Navigation Ranging - SONAR

Zoning Improvement Plan - ZIP

Radio Detecting and Ranging - RADAR

National Aeronautics and Space Administration - NASA

Housing and Urban Development - HUD

Self-Contained Underwater Breathing Apparatus - SCUBA

Explanation:

Since acronyms are just abbreviations of words, let's take a look at those words.

Self-Contained Underwater Breathing Apparatus

Sound Navigation Ranging

Radio Detecting and Ranging

National Aeronautics and Space Administration

Housing and Urban Development

Zoning Improvement Plan

We're going to take these and bold the parts that would probably make up an acronym - usually the first letters.

1. Self-Contained Underwater Breathing Apparatus - SCUBA

2. Sound Navigation Ranging - SONAR

6. Radio Detecting and Ranging - RADAR

4. National Aeronautics and Space Administration - NASA

5. Housing and Urban Development - HUD

6. Zoning Improvement Plan - ZIP