Computers are electronic devices that process and store data. They come in various forms, including desktops, laptops, and servers, and are used for a wide range of tasks, from basic office functions to complex computations.

          Printers are devices that produce hard copies of digital documents. They come in various types, including inkjet, laser, and 3D printers, and are essential for creating physical copies of documents or images.

        Attendance systems automate the process of tracking employee or student attendance. They can use various technologies such as biometrics, RFID cards, or facial recognition to record and manage attendance data.

     Door alarm systems are designed to detect unauthorized entry or forced entry attempts. They trigger an alarm, notifying security personnel or individuals of a potential security breach.

           Customer Relationship Management (CRM) software is a tool that helps businesses manage interactions with customers, streamline sales processes, and improve customer satisfaction. It often includes features for contact management, sales automation, and analytics.