Userboxen

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Maths

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1+1=10This user likes binary.
a²+b²=c²This user is an intermediate mathematician.
Erdős ∞This user has an Erdős number of ∞.

Languages and Such

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enThis user is a native speaker of the English language.
es-3Este usuario puede contribuir con un nivel avanzado de español.
fr-1Cet utilisateur peut contribuer avec un niveau élémentaire de français.
MixThis user has been influenced by too many dialects of English to use one orthography, vocabulary and grammar consistently.
Subj This user prefers that the subjunctive mood be used. Were this user you, he would use it.
mankindThis user supports the use of gender-neutral language.
theyThis user considers singular they standard, modern, informal English usage, so avoids it on Wikipedia.

Miscellany

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  This user enjoys playing chess.
 This user is a skeptic.
 This user enjoys limes AND all things limey.
 This user wants the USA to join the European Union, adopt the Euro, and look after its people  
FCBThis user supports FC Barcelona.
 This user sleeps, but not for predictable amounts of time.
 This user likes to spin pens.
  This user is interested in astronomy.
 This user is a swimmer.
 This user prefers the metric system.
VThis user is a vegetarian.
  This user enjoys the works of Fyodor Dostoevsky.
up Clue dnThis user is interested in Crosswords.
 This user overuses userboxes.
 This user enjoys juggling.
 This user is nocturnal. 
 This user listens to NPR.

Travel, Transit, Locations

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 This user has visited 36 of the 50 U.S. states and the District of Columbia.36
 
21
This user has visited 21 of the 205 countries in the world.
 This user lives in Seattle.
 This user uses public transit.
  This user is a Francophile.

Academia, Learning, Knowledge

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ipa-4
ə
This user has a near-complete understanding of the International Phonetic Alphabet.
 This user knows advanced
music theory.
 This user is interested in linguistics.
ODUThis user attends or attended Old Dominion University.
TEFLThis user is or was a teacher of English as a foreign language.
BAThis user has a Bachelor of Arts degree in Music.