What is the name of the character encoding standard designed to support the use of text in all of the world's digitizable writing systems? Version 17 defines 159 801 characters and 172 scripts for use in ordinary, literary, academic and technical contexts. The encoding standard also encodes 3790 emojis, being responsible for the initial popularization of emoji usage outside of Japan. Idea of the standard is to encode the underlying grapheme and grapheme like units - smallest functional unit of a writing system.

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Answer to yesterday's question: The @ sign is the answer. Today well known for being the symbol used in emails since 1970s and more recently in social media handles.

The usage of @ in Catalan, Spanish and Portuguese refers to a unit of weight named arroba, derived from the Arabic expression of "quarter". Alternatively the symbol has been presumed to describe the word amphora and its standard size and volume.