1. computer technology: computer technology is the core of modern educational technology, including hardware and software, such as computers, servers, network devices, operating systems and educational software.

2. Multimedia technology: Multimedia technology refers to the technology that organically combines various media forms such as words, images, sounds and videos to form rich, vivid and intuitive educational content. For example, audio-visual equipment, interactive whiteboards, digital cameras, etc.

3. Communication technology: Communication technology refers to online communication, learning and teaching between students and teachers through remote communication means such as the Internet. Such as video conference, distance education system, online course platform, etc.