I'm using PowerGREP to find all the dependencies, but it's not an interface that's idealized for this (also I use Windows 7 - but feel free to mention anything that works on Linux too) E.g., see below. I'd like to see every .F90 file where the type with the "day" label is used Code (Text): ! $Id: ESMF_DateMod.F,v 18.104.22.168 2002/04/24 03:25:46 erik Exp $ module ESMF_DateMod !=============================================================================== !BOP ! !MODULE: ESMF_DateMod ! ! !USES: use ESMF_TODMod use ESMF_CalendarMod use ESMF_TimeMod ! ! !PUBLIC TYPES: type ESMF_Date private sequence type(ESMF_Calendar) calendar integer(8) year integer(8) month integer(8) day type(ESMF_TOD) tod integer(8) julianDay integer(8) dayOfYear end type ESMF_Date == As a secondary question - do they also exist in C?