Build extensible hospital admission systems with Five. Inside Five, software developers can write business logic in JavaScript or TypeScript to streamline the admission process. Using functions, developers can create reusable code triggered by user actions, such as when a patient form is submitted or updated. They can query the MySQL database with standard SQL to retrieve or process patient data and define custom input validations for fields like phone numbers or IDs using Regular Expressions (RegEx). Developers can also integrate additional libraries to extend their system's capabilities, ensuring a tailored solution for hospital admission workflows.