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Instead of calling someone’s smart phone or cell phone, users often send messages to others by pressing buttons on their phone’s keypad, keys on the mini keyboard, or images on an on-screen keyboard. Types of messages users send with smart phones include text messages, instant messages, picture messages, and video messages. • A text message is a short note, typically fewer than 300 characters, sent to or from a smart phone or other mobile device. • An instant message is a real-time Internet communication, where you exchange messages with other connected users.
A widely used communications device is a modem (Figure 1-3). Introduction to Computers Chapter 1 7 Communications occur over cables, telephone lines, cellular radio networks, satellites, and other transmission media. Some transmission media, such as satellites and cellular radio networks, are wireless, which means they have no physical lines or wires. Advantages and Disadvantages of Using Computers Society has reaped many benefits from using computers. A user is anyone who communicates with a computer or utilizes the information it generates.
While some companies have set up recycling programs, many claim that forcing them to bear the cost of recycling programs puts the company at a competitive disadvantage when compared to foreign companies that may not be forced to maintain a recycling program. Why is electronics recycling not as popular as other types of recycling? How can companies make it easier to recycle electronics while being compensated fairly for the cost of recycling? Should the government, manufacturers, or users be responsible for recycling of obsolete equipment?