User:Irtwood

en	This user is a native speaker of English.

es-4

El nivel de este usuario corresponde al de un hablante casi nativo del español.

fr-2

Cet utilisateur peut contribuer avec un niveau intermédiaire en français.

$\sum_{i=1}^{\infty}{1 \over i^2}$

This user is an advanced mathematician.

C++

This user can program in C++.

C	This user can program in C.

Java

This user can program in Java.

<html>

This user can write HTML.

pno-3

This user is an advanced pianist.

This user is a historian.