"Investment banks" create loan agreements that cater to the needs of the investors whose funds they attempt to attract; "investors" are always sophisticated and accredited organizations not subject to bank regulatory supervision and the need to cater to the public trust. Investment banking activities are supervised by the SEC and their main focus is on whether the correct or proper disclosures are made to the parties who provide the funds.
The first section contains the terms that are to be used in the document and their definitions. The second section is concerned with the operational terms relevant to the agreement, which means that it points out the amount to be borrowed, the schedule of its repayment, and the interest on the repayment. The second section of the loan agreement is of special interest for the financial agents of the borrower.
For commercial banks and large finance companies, "loan agreements" are usually not categorized although "loan portfolios" are often broadly characterized into "personal" and "commercial" loans while the "commercial" category is then subdivided into "industrial" and "commercial real estate" loans. "Industrial" loans are those that depend on the cashflow and creditworthiness of the company and the widgets or service that it sells. "Commercial real estate" loans are those that repay loans but that depend on the rental revenues paid by tenants who lease space, usually for extended times. More granular categorizations of loan portfolios exist but these are always variations around the larger themes.
If you are planning to build your own home, the entire process can be extremely overwhelming. There are very few projects you or anyone else can take on that are more stressful and more prone to problems. One of the most dizzying aspects of building your own home is having a grasp on all of the legal agreements and contracts that you will need to enter into to get the job done.