Abstract: A multi-source, multiple documents comparison display system for presentation or discussion, installed in a host computer and displayed on a public screen as a multiple document comparison interface using the computer's auxiliary display system. The system is divided into a document collection stage and a comparison display stage. The document collection stage receives documents from multiple resources and decides the number of multiple quadrants to be arranged via the multiple documents comparison interface. The comparison display stage displays each document as a thumbnail, and allows any document to be enlarged and inspected with a control button by clicking on the thumbnail corresponding to the desired document.

Abstract: A portable cart for mobile computer classroom is disclosed, which installs a plurality of computers and electronic devices on a mobile vehicle so that a computer classroom can be set up anywhere. The portable cart includes a first computer, a plurality of second computers, a power supply device, a network hub, a projector, a central control computer, and a wireless network access point. The first computer is used by teachers for teaching, and the second computers are portable computers with wireless transmission capability. When the second computers are not in use, they are placed at a slot rack which is wired for electrical recharging. The power supply device further comprises a recharge device and a plug, wherein the plug can be plugged in the electrical power outlet to provide power to the first computer and the electronic devices installed in the portable cart, and can recharge the second computers through the recharge device.