Answer:
The history of computing devices from the 20th century to the present day is a long and complex one. Starting in the early 1900s with primitive mechanical calculators, the evolution of computing devices has taken us from the first computers, to the first personal computers, to the smartphones and tablets of today.
In the early 1900s, mechanical calculators were developed that used keys to manually enter data, and cranks to perform calculations. These calculators were limited in their capabilities and could only handle basic mathematical operations.
In the 1940s, the first computers were developed. These computers used vacuum tubes to store and process data, and featured a variety of peripherals, such as typewriters, paper tape readers, and magnetic drums. These computers were the first to be used for scientific and military purposes.
In the 1950s, computers started to become smaller and more efficient, with the development of the transistor. This allowed for the development of the first mass-produced computers, such as the IBM 650 and the UNIVAC.
In the 1960s, computers became much smaller and more powerful. This led to the development of the first personal computers, such as the IBM PC and Apple II. These computers featured a keyboard, monitor, and a CPU.
In the 1980s, computers became even more powerful and compact. This led to the development of home-based computers, such as the Commodore 64 and the Apple Macintosh. These computers featured a graphical user interface and could be used for business, gaming, and other purposes.
In the 1990s, the first laptops and mobile devices were developed. These devices featured color screens and more powerful processors, and were the first to be used for mobile computing.
In the 2000s, the development of the smartphone and tablet marked a new era of computing. These devices featured touchscreens, powerful processors, and a variety of apps.
Today, computers continue to become more powerful and compact, with the development of virtual reality, artificial intelligence, and cloud computing. Computing devices now come in a variety of shapes and sizes, from wearables to augmented reality glasses.