/usr/bin/pl
/usr/bin/plld
/usr/bin/plrc
/usr/bin/xpce
/usr/lib64/pl-5.7.11/xpce-6.6.65/bin/x86_64-linux
/usr/lib64/pl-5.7.11/xpce-6.6.65/bin/x86_64-linux/xpce-client
/usr/lib/pl-5.7.11/xpce-6.6.65/bin/i686-linux
/usr/lib/pl-5.7.11/xpce-6.6.65/bin/i686-linux/xpce-client
You may install this package on CentOS with
yum
install pl