The Mit Ghamr Savings Bank, founded by Ahmad El-Najjar in Egypt, was the first successful modern attempt at interest-free banking. It operated on the principle of profit-sharing and focused on rural savings and development.

Ujrah refers to payment for services (wages) or for the use of an asset (rent). Islamic banks charge Ujrah for services such as issuing ATM cards, managing safety deposit boxes, or acting as an agent (Wakala).

PLS is the hallmark of 'Equity-based' Islamic finance (Musharaka and Mudaraba). It encourages the bank to focus on the viability of the project rather than just the creditworthiness of the borrower, leading to more ethical and stable economic development.

Murabaha is ideal for working capital and inventory financing. The bank buys the raw materials on behalf of the business and sells them to the business at a markup, allowing the business to pay for the materials over time.

Zakat is one of the Five Pillars of Islam. In a financial context, it is a 2.5% levy on wealth that has been held for a year (above the threshold or Nisab). It is used specifically for eight categories of people, including the poor and needy.

Amanah refers to honesty, trustworthiness, and the fulfillment of trust. In finance, it describes a relationship where an asset is held by someone (the trustee) who is not responsible for its loss unless they were negligent or acted in bad faith.

Bai al-Dayn is the trading of debt. While permitted in some jurisdictions like Malaysia under certain conditions, most global Sharia standards (like AAOIFI) prohibit the sale of debt at a discount, as it is seen as a form of riba.

A Special Purpose Vehicle (SPV) is a separate legal entity created to hold the assets and issue the Sukuk. This ensures that the assets are 'ring-fenced' and protected from the creditors of the original company if it goes bankrupt.

Urbun is a deposit paid by a buyer to a seller. If the sale is completed, it counts toward the price. If the buyer cancels, the seller may keep the deposit. This is used to secure contracts while allowing the buyer time to arrange funds.

In a Wakala investment account, the bank acts as an agent (Wakil). The client pays a specific fee to the bank for managing the investment. If there is an excess profit beyond the agreed benchmark, the bank often keeps it as an 'incentive fee.'