Idaho "corporation", "incorporated", "company", "limited", or the abbreviation "corp.", "inc.", "co.", or "ltd.", or words or abbreviations of like import in another language; provided however, that if the word "company" or its abbreviation is used it shall not be immediately preceded by the word "and" or by an abbreviation of or symbol representing the word "and" § 30-1-401 Idaho Statutes
sp.p. (spółka partnerska): ≈ limited liability partnership May also be denoted by the addition of i partner(zy) ("and partner(s)") to the firm's name. Can only be used for the purpose of practicing as a licensed professional listed in the appropriate provision of the Commercial Companies Code. The partners are fully liable for the partnership's debts, with the exception of debts incurred by other partners practicing their licensed profession and employees under their direction.
PLLC, Professional Limited Liability Company: some states do not allow certain professionals to form an LLC that would limit the liability that results from the services professionals provide such as doctors, medical care; lawyers, legal advice; and accountants, accounting services; architects, architectural services; when the company formed offers the services of the professionals. Instead those states allow a PLLC or in the LLC statutes, the liability limitation only applies to the business side, such as creditors of the company, as opposed to the client/customer service side, the level of medical care, legal services, or accounting provided to clients. This is meant to maintain the higher ethical standards that these professionals have committed themselves to by becoming licensed in their profession and to prevent them from being immune (or at least limit their immunity) to malpractice suits.
LLCs have fewer ongoing requirements compared to their corporation counterparts. For example, an LLC is not required to keep minutes or hold annual meetings. An LLC also does not have a board of directors, and isn't is held to the same record keeping standards of a corporation. Keep in mind that the state of incorporation in will have its own set of annual requirements. That includes filing the required business licenses and permits, which vary from state to state. Be sure to check in with your Secretary of State to ensure you don't accidentally miss any required filings.
LP, Limited partnership: a partnership where at least one partner (the general partner, which may itself be an entity or an individual) has unlimited liability for the LP's debts and one or more partners (the limited partners) have limited liability (which means that they are not responsible for the LP's debts beyond the amount they agreed to invest). Limited partners generally do not participate in the management of the entity or its business.
Unltd or Ultd (Unlimited/無限公司): similar to a limited liability company (Ltd) but whose members or shareholders do not benefit from limited liability should the company ever go into formal liquidation. It is not a requirement under company law to add or state the word or designation Unlimited (無限公司) or its abbreviations (Unltd or Ultd) at the ending of its legal company name, and most unlimited companies do not.