person, corporation, firm, association engaged in the business of carrying or transporting
passengers, goods or both, by land, water, air, for compensation, offering services to the public;
must exercise extraordinary diligence .
he holds himself out as engaged in public service to all persons indifferently
PRIVATE CARRIER
is not engaged in the business of carrying for the public
requires only ordinary diligence
carries only for persons with whom he has initial contract and assumes no obligation to carry for
the others