How to find if its VM or Real host

Linux -

    dmidecode | grep -i vmware

AIX -

    nonlpar# umame -L
    -1 NULL

    lparhost# uname -L
    5 lparhost

Solaris -

    bash-3.00# prtdiag -v | head -3
    System Configuration: VMware, Inc. VMware Virtual Platform
    BIOS Configuration: Phoenix Technologies LTD 6.00 10/13/2009

    bash-3.00# modinfo | grep -i vm
    148 fffffffff7e71000 3b38 244 1 vmxnet3s (VMware EtherAdapter v3 b341836)
    205 fffffffff78e7000 21b0 230 1 vmmemctl (VMware Memory Control b341836)