What is the difference between intellectual property and real property law?

an arrangement in which a manufacturer sells a product to a reseller only on condition that the reseller also buys another less popular product; also called a Tying Contract.
an often illegal agreement by one party to sell a product or service only on condition that the buyer will also purchase another and different product or service or will not purchase the product or service from any other supplier or will adhere to some other restriction.

2. 
   What do “trustbusters” mean
   

a person who seeks the dissolution of corporate trusts, esp a federal official who prosecutes trusts under the antitrust laws

1. 
   What is “predatory pricing”?
   

Predatory pricing is a deliberate strategy, usually by a dominant firm, of driving competitors out of the market by setting very low prices or selling below the firm's incremental costs of producing the output.
Predatory pricing is the illegal act of setting prices low to attempt to eliminate the competition.
Predatory pricing violates antitrust laws, as it makes markets more vulnerable to a monopoly. However, allegations of this practice can be difficult to prosecute because defendants may argue successfully that lowering prices is part of normal competition, rather than a deliberate attempt to undermine the marketplace. What’s more, predatory pricing doesn’t always succeed in its goal because of the difficulties in recouping lost revenue and successfully eliminating competitors.