Here are some examples:
* NASA (National Aeronautics and Space Administration)
* NATO (North Atlantic Treaty Organization)
* SCUBA (Self-Contained Underwater Breathing Apparatus)
* LASER (Light Amplification by Stimulated Emission of Radiation)
It's important to note that acronyms are pronounced as words, while initialisms are pronounced by saying each letter individually. For example, FBI is an initialism, while NATO is an acronym.