<Ul> <Li> Corp., Inc., Corporation, Incorporated: used to denote corporations (public or otherwise). These are the only terms universally accepted by all 51 corporation chartering jurisdictions in the United States . However, in some states other suffixes may be used to identify a corporation, such as Ltd., Co. / Company, or the Italian term S.p.A. (in Connecticut; see under Italy). Some states that allow the use of "Company" prohibit the use of "and Company", "and Co .", "& Company" or "& Co .". In most states sole proprietorships and partnerships may register a fictitious "doing business as" name with the word "Company" in it . For a full list of allowed designations by state, see the table below . </Li> <Li> Professional corporation, PC or P.C.: those corporate entities for which many corporation statutes make special provision, regulating the use of the corporate form by licensed professionals such as attorneys, architects, accountants, and doctors . </Li> <Li> Doing Business As: denotes a business name used by a person or entity that is different from the person's or entity's true name . DBAs are not separate entities and do not shield the person or entity who uses the DBA as a business name from liability for debts or lawsuits . Filing requiments vary and are not permitted for some types of businesses or professional practices . See also Delaware corporation, Delaware statutory trust, Nevada corporation, and Massachusetts business trust . </Li> </Ul> <Li> Corp., Inc., Corporation, Incorporated: used to denote corporations (public or otherwise). These are the only terms universally accepted by all 51 corporation chartering jurisdictions in the United States . However, in some states other suffixes may be used to identify a corporation, such as Ltd., Co. / Company, or the Italian term S.p.A. (in Connecticut; see under Italy). Some states that allow the use of "Company" prohibit the use of "and Company", "and Co .", "& Company" or "& Co .". In most states sole proprietorships and partnerships may register a fictitious "doing business as" name with the word "Company" in it . For a full list of allowed designations by state, see the table below . </Li> <Li> Professional corporation, PC or P.C.: those corporate entities for which many corporation statutes make special provision, regulating the use of the corporate form by licensed professionals such as attorneys, architects, accountants, and doctors . </Li> <Li> Doing Business As: denotes a business name used by a person or entity that is different from the person's or entity's true name . DBAs are not separate entities and do not shield the person or entity who uses the DBA as a business name from liability for debts or lawsuits . Filing requiments vary and are not permitted for some types of businesses or professional practices . See also Delaware corporation, Delaware statutory trust, Nevada corporation, and Massachusetts business trust . </Li>

What type of companies use it in the business