The article discusses the use of a password-based door lock system using 8051 microcontroller. Such electronic door lock systems are designed to make burglary more difficult and provide added security to homes and buildings. This particular system is unique in that it requires a password to be entered for access to the building. Once the correct password is entered, the door is unlocked automatically, making it a convenient and secure option for people who want to avoid carrying keys. The system is also integrated, meaning all components work together to ensure the lock cannot be easily breached. The 8051 microcontroller is a compact yet efficient device that provides reliable performance and programming capabilities for this type of lock system. The article also highlights the ease of building such systems using microcontrollers and provides readers with the necessary resources to start building their own password-based door lock systems. Overall, the article takes a friendly tone of voice and uses a third-person point of view to offer an informative and approachable introduction to password-based door lock systems using 8051 microcontrollers.