There are many valuable documents within "bin" folder of the ClearCase installation folder.
cc_admin.pdf :RATIONAL® CLEARCASE® ADMINISTRATOR’S GUIDE UNIX/WINDOWS DITION
cc_build.pdf :RATIONAL® CLEARCASE® BUILDING SOFTWARE WINDOWS EDITION
cc_cal.chm :ClearCase Automation Library (CAL)
cc_dev.pdf :Working in Base ClearCase
cc_intro.pdf :RATIONAL® CLEARCASE® INTRODUCTION UNIX/WINDOWS EDITION
cc_omake.pdf :RATIONAL® CLEARCASE® OMAKE GUIDE WINDOWS EDITION
cc_proj.pdf :RATIONAL® CLEARCASE® MANAGING SOFTWARE PROJECTS WINDOWS EDITION
cc_ref_1.pdf :RATIONAL® CLEARCASE® COMMAND REFERENCE (A–L) UNIX/WINDOWS EDITION
cc_ref_2.pdf :RATIONAL® CLEARCASE® COMMAND REFERENCE (M–Z) UNIX/WINDOWS EDITION
ccms_relnotes.pdf : RATIONAL® CLEARCASE® AND CLEARCASE MULTISITE® RELEASE NOTES
cpf_install.pdf :RATIONAL® CLEARCASE® PRODUCT FAMILY INSTALLATION GUIDE WINDOWS EDITION
ucm_dev.pdf :RATIONAL® CLEARCASE® DEVELOPING SOFTWARE WINDOWS EDITION
xmldiffmrg.chm :Working in the XML Diff Merge windows
and there are also many .hlp files that contain help information.