EMT) is a term used in various countries to denote a healthcare provider trained to provide pre-hospital emergency medical services.

 paramedic is used as the job title for all EMS personnel,

And there you are ..... ask and you shall

So the term is interchangable

There is a HUGE difference in an EMT and a paramedic and no, they are not interchangable.  An EMT can provide basic life support on scene and en route to a hospital, which is limited to bandages, splints, basic vitals, etc.  A paramedic has lots more training (and gets paid lots more!) and can provide advanced life support on scene and en route to a hospital.  Paramedics can start IV lines, administer drugs, as well as providing all the basic life suport an EMT can provide.  Paramedics must go through extensive training and lots of hours of internship as well as extra classwork and testing to be able to provide advanced life support.  EMT's can go through one class at a junior college (such as BC) and take a test and are certified.  It takes paramedics almost a year to get their training.  The biggest difference is the ability of a paramedic to start IV lines and give medications.   

I found this....justsaying

Guess it depends on jurisdiction, see below..........thanks for correcting me...

Emergency Medical Technician (EMT)

Emergency medical technicians, also known as Ambulance Technicians in the UK and EMT in the United States. Technicians are usually able to perform a wide range of emergency care skills, such as Automated defibrillation, care of spinal injuries and oxygen therapy.^[38][39] In few jurisdictions, some EMTs are able to perform duties as IV and IO cannulation, administration of a limited number of drugs, more advanced airway procedures, CPAP, and limited cardiac monitoring and .^[40] Most advanced procedures and skills are not within the national scope of practice for an EMT-B.^[41] As such most states require additional training and certifications to perform above the national curriculum standards

The information you have is very general and doesn't apply to California law completely. 

Yes, an EMT-B is our basic life support provider (also just known as an EMT in California).  EMT-P is a paramedic.  In most California counties, ambulances have one of each on them.  (At Hall Ambulance, ambulances that run 911 calls (ALS ambulances, advanced life support) must have one paramedic on them and usually one EMT.  Sometimes they're lucky enough to have 2 paramedics, but not usually.)  BLS (basic life support) units at Hall Ambulance have 2 EMT's and can do patient transfers to/from hospitals, medical appts, etc. 

justsaying,

 And I"m guessing betty now has the answer to her question. thats assuming she reads her comments......gump..out

And also, just to let you all know, it's kinda considered insulting when you call either an EMT or a Paremedic an "ambulance driver". 

Whatever. Just get my ass to the hospital!  We'll deal with the niceties later.