How to check Oracle Application Home Versions in R12

 10.1.2 Oracle Home Version:

/u01/app/applmgr/apps/tech_st/10.1.2

-bash-4.1$ frmcmp_batch
Forms 10.1 (Form Compiler) Version 10.1.2.3.0 (Production)

Forms 10.1 (Form Compiler): Release  - Production

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

PL/SQL Version 10.1.0.5.0 (Production)
Oracle Procedure Builder V10.1.2.3.0 - Production
Oracle Virtual Graphics System Version 10.1.2.0.0 (Production)
Oracle Multimedia Version 10.1.2.0.2 (Production)
Oracle Tools Integration Version 10.1.2.0.2 (Production)
Oracle Tools Common Area Version 10.1.2.0.2
Oracle CORE     10.1.0.5.0      Production

10.1.3 Oracle Home Version:

-bash-4.1$ pwd
/u01/app/applmgr/apps/tech_st/10.1.3/Apache/Apache/bin
-bash-4.1$ cd /u01/app/applmgr/apps/tech_st/10.1.2
-bash-4.1$ httpd -version
Server version: Oracle-Application-Server-10g/10.1.3.5.0 Oracle-HTTP-Server
Server built:   Jul 21 2009 11:12:22