Review : IT infrastructure hardware and software

IT’s infrastructure consist of five major components, they are :
• Computer hardware
Computer hardware consist of the tools to processing, data storage, input and output.
The input device likes keyboard, scanner, camera. The process device like processor, monitor. The output device likes monitor, printer, speaker.
• Computer software
Computer software includes both system software and application software. System software manages the resources and activities of the computer. Application software is to apply the specific task to an end user.
• Data management technology
This technology needs some data management software to organizes, manages, and process data to business purpose that concerned with inventory, customer, and vendors.
• Networking and telecommunications technology
Networking and telecommunications technology provides data, voice, and video connectivity to employees, customers, and suppliers.
• Technology services
When business need to make major system changes or implement an entirely new IT infrastructure, they typically turn to external consultants to help them with systems integration. System integration means ensuring that the new infrastructure works with the firm’s older, so-called legacy system and that the new elements of the infrastructure work with one another. Legacy systems are generally order transaction processing systems created for older computers that continue to be used to avoid the high cost of replacing or redesigning them.
And they must coordinated each other to give good result.

Types of computers
• Personal computers (PC)
This computer using for working alone or with a few other people in a small business.
• Workstation
This computer fits on a desktop but has more powerful mathematical and graphics-processing capabilities than a PC
• Server
Server computers are specifically optimized to support a computer network, enabling users to share files, software, peripheral devices (such as printers), or other network resources.
• Mainframe
A mainframe is a large-capacity, high-performance computer that can process large amounts of data very rapidly.
• Supercomputer
A supercomputer is a specially designed and more sophisticated computer that is used for tasks requiring extremely rapid and complex calculations with thousands of variables, millions of measurements, and thousand of equations.
• Grid computing
Grid computing involves connecting geographically remote computers into a single network to create a “virtual supercomputer” by combining the computational power of all computers on the grid.

The principal storage technologies are :
• Magnetic disks
• Optical disks
• Magnetic tape
• Storage networks

Contemporary hardware trends:
• The emerging mobile digital platforms
• Nanotechnology
• Cloud computing
• Autonomic computing
• Virtualization,
• Multicore processors

There are a number of software tools that businesses use to build Web sites and applications that run on the web, like :
• Java
• Ajax
Java and ajax used for building applications that run on the web.
• HTML
HTML is used for creating Web pages.