OSCAR was developed by McMaster associate professor Dr. David Chan and was first used in Hamilton in 2001.
Along with providing an electronic record the doctor can access anywhere, it has many tools to help doctors, such as checklists to diagnose illness, alerts when drugs are improperly prescribed and reminders when screening is due.
The system gives patients access to their own health records to check whether test results have come in, track their cholesterol over time or provide other doctors access if they need care when they're out of town.
"Patients more and more now want to access their own records," said Dr. David Price, chair of McMaster's department of family medicine.
He thinks OSCAR has the potential to bring Ontario up to speed.
"We are one of the laggards in the developed world in developing electronic medical records for our patients," he said.