The computer-on-module are computers that are single board. It is a total computer built on a single circuit board. But, there are differences between a single board computer and a computer on module. The computer on module will usually not lack the standard connectors for input output peripherals that are to be directly attached to the board. These peripherals are wired so that they are brought out to pin headers on the board. The module is mounted on a baseboard and the baseboard will have standard peripheral connectors. The words ‘computer on module’ was coined by Venture Development Corporation. The term describes this type of embedded computer boards.
The PC Card or PCMCIA is the form factor designed for laptop computers. The PCMCIA readers are used to read these cards. The PCMCIA was actually meant for memory expansion but the existence of a general standard for notebook peripherals led to many devices being made available in this condition. They opened up many possibilities and they are home banking, internet access, secure download of content, computer access control, network security, people identification and many other facilities. The PCMCIA is used to read these cards. The chip cards are the cards with embedded, integrated circuits that can process information. The chip card readers read the card for use by the customer. The chip card receives input that is processed by way of ICC applications and delivered as an output. Thee rare two types of these cards – memory cards and microprocessor cards.