Pretty common in our industry to use apostrophes after an acronym to make it plural. An example is VM's and VMS are two different things. When you get lazy and

Pretty common in our industry to use apostrophes after an acronym to make it plural. An example is VM's and VMS are two different things. When you get lazy and do vm's and vms you can not always be sure, I have even written an email where I stated "we need multiple VMS VM's".