合同，含有合起来相同的意思，最早的合同是当事人双方把合同的内容写在两块竹简上，两简相并，中缝写“合同”二字，作为双方约定的凭证。合同是契约的一种，它是人们在经济交往中，为了保证信守所定事项，而制作的对双方都具有约束力的文件，有了这样的契约，买卖双方或是借? The contract contains the same meaning together, the earliest contract is the parties to the contents of the contract written on two bamboo slips, two Janes and the merger, Suture write the word “contract”, as both parties agreed vouchers. A contract is a kind of contract. It is a document binding on both parties made by people in economic exchanges in order to ensure that they keep the prescribed issues. Is there any such contract, buyer or seller?