The Full form of PER OS is By mouth, or PER OS stands for By mouth, or the full name of given abbreviation is By mouth.
PER OS (By mouth)
By mouth is known as PER OS.
PER OS all full forms
All the above full forms are related to PER OS. A little information is given about one of these full forms. If you are not satisfied with the information given about 'By mouth (PER OS)', then comment. Or if you know more about 'By mouth (PER OS)', then write.
