1 If the stem of the yo form is exactly the same as the stem of the infinitive, the verb is regular; use this stem and attach the appropriate endings [the endings for the subjunctive are for the most part the opposite conjugation endings of the present indicative].
Inc (Incorporated) and Corp (Corporation or Corporated) are both shorthands for a certain business entity - a Corporation. An LLC is also an abbreviation for a business entity - a Limited Liability Company.
Inc. Inc. is the abbreviation for incorporated. An incorporated company, or corporation, is a separate legal entity from the person or people forming it. Directors and officers purchase shares in the business and have responsibility for its operation. Incorporation limits an individual's liability in case of a lawsuit.