What does [WSS18] mean? What's the reason for showing it?

Meta
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for example a recent post title is:

[WSS18] Reinforcement Q-Learning for Atari Games

does this stand for “wolfram school” or something? is there a way to follow the school question on some site (is there further information on some other website on WSS18?)

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Wolfram Summer School 2018. The projects are being posted here.