+% acronyms
+\usepackage{acronym}
+\acrodef{ALE}{atomic layer epitaxy}
+\acrodef{APB}{anti phase boundary}
+\acrodef{c-Si}{crystalline silicon}
+\acrodef{CVD}{chemical vapor deposition}
+\acrodef{HDTV}{high definition television}
+\acrodef{IBS}{ion beam synthesis}
+\acrodef{LED}{light emitting diode}
+\acrodef{MBE}{molecular beam epitaxy}
+\acrodef{MEMS}{microelectromechanical system}
+\acrodef{PVT}{physical vapor transport}
+\acrodef{RF}{radio frequency}
+\acrodef{RT}{room temeprature}
+\acrodef{RBS}{Rutherford backscattering spectrometry}
+\acrodef{IR}{infrared}
+
+% units
+\usepackage{units}
+