# QloApps Introduction
QloApps is one of a kind true open source hotel reservation system and a booking engine. The system is dedicated to channeling the power of the open-source community to serve the hospitality industry.
QloApps is built on PHP while MySQL is used to manage databases apart from these languages HTML, CSS, Javascript, and JavaQuery are also used. Smarty is used as a templating engine. QloApps architecture
Along with these languages, you must be familiar with Object-Oriented Programming to start development on QloApps.
The technical structure of QloApps is based on 3-tier architecture (MVP).
To develop on QloApps or to make any changes in the system you will have to go through any of these four ways: Modules, Themes, Hooks, and Overrides.
All these concepts will be discussed further in this documentation in detail.
# Demo
Link : https://demo.qloapps.com (opens new window)
Username : [email protected]
Password : demodemo
# Getting support
If you need help using QloApps, contact the QloApps support team by raising a ticket at https://webkul.uvdesk.com/en/customer/create-ticket/ (opens new window) or on the forums at https://forums.qloapps.com/ (opens new window)
# License
OSL V3: https://opensource.org/licenses/OSL-3.0 (opens new window)