[nielssen@consulting ~]$ cat nielssen_consulting.sh

#!/bin/sh

company_name() {
        echo "Nielssen Consulting"
        return 0
}

contact_info() {
        echo "Grønnegata 1 A"
        echo "NO-0350 OSLO"
        echo "NORWAY"
        echo
        echo "Mobile: +47 916 15 800"
        echo "Email.: consulting <at> nielssen.com"
        echo "URL...: http://www.nielssen.com"
        return 0
}

case "$1" in
        company)
                company_name
                ;;
        contact)
                contact_info
                ;;
        all)
                company_name
                contact_info
                ;;
        *)
                echo "Usage: $0 {company|contact|all}"
                exit 1
esac

exit $?

[nielssen@consulting ~]$ _