Not sure if this is the correct place to post this question..
and with a nod to Aaron's clean humor campaign..
9Down in Sundays NY times crossword is:
"Some operators in Boolean Logic"
4 letters
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"