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base is the base or the base encoding method with the characters.
totp(time-based one-time password) is an algorithm to generate otp(one-time password) from the unix time.
server is an app to response request.
javascript is the standard programming language for the browser.
pwa(progressive web app) is an app that can be installed via a browser on windows, android, etc.
service worker is javascript that can intercept the process to fetch resources.
graphic/
raster is a file format composed of pixels, which are colored square dots. png, jpeg, bmp, gif, etc.
vector is a file format composed of paths. svg, android vectordrawable, etc.
png(portable network graphics) is the raster, composed of binary data.
apng(animated portable network graphics) is png with chunks added in order acTL, fcTL, fdAT.
svg(scalable vector graphics) is the vector, composed of text data.
audio/
wav(waveform audio file format) is a file format composed of binary data.