LoadFCS XOP v1.0 The LoadFCS XOP is an XOP for flow-cytometry users, which enables Igor Pro to load raw data in FCS3.0 compatible, list-mode files. This version of LoadFCS requires Igor Pro 6.20 or later. LoadFCS adds the following to Igor: A menu item in the Load Waves submenu. A command line operation. This help file. Help in the Igor Help Browser Command Help pane. LoadFCS is designed for FCS3.0; its specification, "Data File Standard forFlow Cytometry, Version FCS3.0" is available from www.isac-net.org. It has mainly tested with FCS2.0 type file. Mamoru Yamanishi May 2011