1, The full form of FLAC is Free Lossless Audio Codec. It’s used on Computing ,Codec in Worldwide

FLAC stands for Free Lossless Audio Codec, an audio format similar to MP3, but lossless, meaning that audio is compressed in FLAC without any loss in quality. This is similar to how Zip works, except with FLAC you will get much better compression because it is designed specifically for audio, and you can play back compressed FLAC files in your favorite player (or your car or home stereo, see supported devices) just like you would an MP3 file.

FLAC stands out as the fastest and most widely supported lossless audio codec, and the only one that at once is non-proprietary, is unencumbered by patents, has an open-source reference implementation, has a well documented format and API, and has several other independent implementations.

2, The full form of FLAC is Free Legal Advice Centres. It’s used on Associations & Organizations ,Social Welfare Organizations in Ireland

Free Legal Advice Centres is a non-profit human rights organisation that provide pro bono publico assistance via a network of legal advice clinics throughout the Republic of Ireland, as well as operating a free telephone information and referral line and engaging in advocacy, campaigning and policy analysis work.