Argonne National leaned heavily on Tcl relatively recently for a petascale super-computer project of theirs[0] (I was introduced to it by Justin Wozniak of Argo

Argonne National leaned heavily on Tcl relatively recently for a petascale super-computer project of theirs[0] (I was introduced to it by Justin Wozniak of Argonne at a Tcl conference in Manassas). [0] https://www.mcs.anl.gov/~wozniak/papers/Swift_Tcl_2015.pdf https://www.mcs.anl.gov/~wozniak/papers/Swift_Tcl_2015.pdf