Dot matrix printers use printer ribbons. A dot matrix printer is a type of impact printer that produces characters and images on paper by striking a series of dots against an ink-soaked ribbon. The ribbon transfers ink onto the paper to create text and graphics. Dot matrix printers were widely used in the past for tasks such as printing invoices, receipts, and multipart forms.

1. E-governance refers to the use of information and communication technologies (ICT) to increase the reach and efficiency of public services.

2. “E” in e-governance stands for ‘electronic’.

3. E-governance can be defined as the application of information and communication technology (ICT) to provide government services, exchange of information, transactions, and integration of pre-existing services and information portals.

The CPU (Central Processing Unit), motherboard, and RAM (Random Access Memory) are internal components of a computer hardware system. These components are essential for the computer to function and are located inside the computer's casing.