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Types of Computers

Author: Sophia

what's covered
Computers are designed to be general-purpose devices that can solve many different types of problems. As personal computer technology has improved, many of their components have been integrated into other devices that were purely either mechanical or analog. We've also seen the fundamental definition of the computer evolve. Ever since the invention of the personal computer, users have continued to ask for better ways to carry them and move them from place to place. Here we will examine several types of devices that represent the latest trends in personal computing.

Specifically, this lesson will cover:

Table of Contents

1. Desktop Computers

Despite the rising popularity of portable devices like laptops and tablets, desktop computers remain highly relevant in certain situations. Desktop computers have evolved significantly, becoming powerful, versatile tools for a wide range of functions. Initially designed for basic tasks, modern desktops now handle intensive activities like video editing, gaming, and 3D modeling, thanks to multi-core processors and advanced graphics capabilities. Notable milestones include the IBM Personal Computer in 1981, which set the PC standard, Apple's Macintosh in 1984, which introduced the graphical user interface (GUI), and the launch of Windows 95 in 1995, which popularized the Start menu and taskbar. The introduction of Intel's Pentium processors in 1993 further boosted performance, enabling complex applications and multitasking.

the monitor, mouse, and keyboard belonging to a desktop computer
The hard drive for this desktop computer (not pictured) is typically placed in a convenient location beneath the user's desk.

Enhanced storage solutions, such as SSDs and large-capacity hard drives, provide ample space and quick data access. Desktops support extensive connectivity options, including multiple USB ports, HDMI outputs, and networking capabilities, facilitating seamless integration with other devices and peripherals. Their flexibility to upgrade components like RAM, GPUs, and storage ensures they remain capable of handling the latest software and applications. In professional environments, desktops are crucial for tasks requiring reliability and robust performance, such as data analysis, software development, and financial modeling.


2. Portable Computers

As computing technology evolved, so did the needs of businesses making use of computers. One of the major concerns for businesses in the late 1970s and early 1980s had to do with how portable a computer system could be. Information is critical to decision-making in business; therefore, companies need computers to be readily accessible to their employees at all times, during the workday, and in a wide array of locations (home, remote offices, while in transit). In 1983, Compaq Computer Corporation developed the first commercially-successful portable personal computer. By today’s standards, the Compaq PC was not very portable: weighing in at 28 pounds, the computer was designed like a suitcase, to be lugged around and then laid on its side to be used. Besides portability, Compaq was successful because it was fully compatible with the software being run by the IBM PC, which was the standard for business.

In the years that followed, portable computing continued to improve, giving us laptop and notebook computers. The “luggable” computer has given way to a much lighter clamshell computer that weighs from four to six pounds and runs on batteries. In fact, the most recent advances in technology give us a new class of laptop that is quickly becoming the standard: these laptops are extremely light and portable and use less power than their larger counterparts. The MacBook Air is a good example of this: it weighs less than three pounds and is only 0.44 inches thick!

a front view of Apple's MacBook Air laptop computer with its lid open
The MacBook Air is a laptop computer first manufactured by Apple Inc. in 2008.

Finally, as more and more organizations and individuals are moving much of their computing to the Internet, laptops are being developed that use cloud computing (“the cloud”) for all of their data and application storage. These laptops are also extremely light because they have no need of a hard disk at all! A good example of this type of laptop (sometimes called a netbook) is Samsung’s Chromebook.

term to know
Cloud Computing
Storing and processing data over the Internet rather than on personal computer hardware.


3. Smartphones

The first modern-day mobile phone was invented in 1973. Resembling a brick and weighing in at two pounds, it was priced out of reach for most consumers at nearly four thousand dollars. Since then, mobile phones have become smaller and less expensive. Today, mobile phones are a modern convenience available to all levels of society. As mobile phones evolved, they became more like small computers. These smartphones have many of the same characteristics as a personal computer, such as an operating system and memory. The first smartphone was the IBM Simon, introduced in 1994.

In January 2007, Apple introduced the iPhone. Its ease of use and intuitive interface made it an immediate success and solidified the future of smartphones. Running on an operating system called iOS, the iPhone was really a small computer with a touchscreen interface. In 2008, the first Android phone was released by Google, with similar functionality.

Major developments in smartphone history include the launch of the App Store (2008), which revolutionized mobile software distribution, the rollout of 4G and 5G networks (2009-2020), significantly enhancing data speeds and connectivity, and the introduction of foldable smartphones (2019), which marked a new era in form factor innovation.

terms to know
Smartphone
A mobile phone that incorporates the same functionality as a computer.
Form Factor
The physical characteristics of a device such as size, shape, weight, and usability.


4. Tablet Computers

A tablet computer is one that uses a touchscreen as its primary input and is small enough and light enough to be carried around easily. Tablet computers generally have no keyboard and are self-contained inside a rectangular case. The first tablet computers appeared in the early 2000s and used an attached pen as a writing device for input. These tablets ranged in size from small personal digital assistants (PDAs), which were handheld, to full-sized, 14-inch devices. The primary advantage of a tablet computer lies in its ease of use. The touchscreen provides a simple yet efficient way for users to interact with and manipulate a tablet computer. In most instances, there is no need for training or advanced computer knowledge to use a tablet PC. Most early tablets used a version of an existing computer operating system, such as Windows or Linux.

These early tablet devices were, for the most part, commercial failures. Then, in January 2010, Apple introduced the iPad, which ushered in a new era of tablet computing. Instead of a pen, the iPad used the finger as the primary input device. Instead of using the operating system of their desktop and laptop computers, Apple chose to use iOS, the operating system of the iPhone. Because the iPad had a user interface that was the same as the iPhone, consumers felt comfortable and sales took off. The iPad has set the standard for tablet computing.

a person using a stylus on a tablet computer to purchase home furnishings online
A stylus is ergonomically designed to help you make more precise selections on your tablet. It's modeled after a common pen allowing you to point, swipe, and draw.

After the success of the iPad, significant developments in tablet technology include the release of the first Google Android tablets (2011), which expanded the market with diverse options. The introduction of the Microsoft Surface (2012) combined tablet portability with PC functionality, featuring a detachable keyboard and full Windows OS. Advancements in stylus technology, such as the Apple Pencil (2015), significantly improved the precision and capabilities of tablets for creative and professional use.

term to know
Tablet Computer
A computer that uses a touchscreen as its primary input.


5. Integrated Computing

Along with advances in computers themselves, computing technology is being integrated into many everyday products. From automobiles to refrigerators to airplanes, computing technology is enhancing what these devices can do and is adding capabilities that would have been considered science fiction just a few years ago. Here are three of the latest ways that computing technologies are being integrated into everyday products:

  • The Smart House: “Smart houses” connect home appliances and other devices to mobile phones or tablets, allowing homeowners to control these devices even when they are not home. A home security system is a common application of smart house technology. If you leave on vacation in a hurry and forget to activate your home’s alarm system, you can turn it on from your smartphone while on the way to the airport. Other applications include turning on and off kitchen appliances, viewing in-home surveillance footage, or even opening and closing windows and shades.
  • The Self-Driving Car: A growing trend in the auto industry is the idea of the self-driving car, or a car that can automatically perform functions that could previously only be done manually by the driver. A self-driving car is typically installed with cameras or sensors around the car that allow it to “see” objects that might be dangerous, such as an oncoming vehicle. This allows the car to automatically maneuver to avoid collisions. Companies are also working on auto-pilot functions that allow the car to automatically adjust its speed based on traffic conditions, and to park itself without any input from the driver.
  • The Smart Watch: Smartwatches merge the design and functionality of a wristwatch with that of a mobile device. Simple smartwatches are able to display the weather or run calendar applications. More sophisticated smart watches integrate text and email applications, driving directions, health and fitness applications, and much more.
summary
We studied the computing power and essentials of the desktop computer and how it contributed to the development of more versatile and portable options in personal computing. We reviewed several mobile variations on the personal computer, such as the tablet computer and the smartphone. These technologies have improved rapidly over the years, making today’s computing devices much more powerful and convenient than devices from just a few years ago. Many devices today use cloud computing for data and application storage via the Internet. Finally, we discussed some examples of how computing technology integrates with other products, such as home applications and even cars.

Source: Derived from Chapter 2 of “Information Systems for Business and Beyond” by David T. Bourgeois. Some sections removed for brevity. www.saylor.org/site/textbooks/Information%20Systems%20for%20Business%20and%20Beyond/Textbook.html

Terms to Know
Cloud Computing

Storing and processing data over the Internet rather than on personal computer hardware.

Form Factor

The physical characteristics of a device such as size, shape, weight, and usability.

Smartphone

A mobile phone that incorporates the same functionality as a computer.

Tablet Computer

A computer that uses a touchscreen as its primary input.