ICT refers to the advanced use of digital devices, communication media, and connections for processing and storing data. Key internet services provided include email communication, scientific research, e-learning, and e-commerce. ICT expanded into portable technology like laptops, tablets, and smartphones, along with office applications for word processing and data management.
Standard computers include fixed desktop setups and portable laptops or tablets. Other devices like the Personal Digital Assistant (PDA), smartphones, digital cameras, and media players are essential tools for capturing or managing information. Physical components range from input devices like scanners and mice to output devices like printers and high-resolution monitors.
Digital data is stored in containers measured by size, starting from the bit as the smallest unit. Eight bits form a byte, which typically represents a single character or symbol. Storage capacity increases in multiples of 1024, moving from kilobytes and megabytes to gigabytes and terabytes. The speed and efficiency of processing are heavily influenced by these memory scales and the Random Access Memory (RAM) available.
Hardware components connect to the motherboard through specialized ports for data transfer. The Universal Serial Bus (USB) serves as a common gateway for many peripherals like keyboards and external drives. High-Definition Multimedia Interface (HDMI) ports are used specifically to transmit high-quality audio and video signals to displays. These ports allow external hardware to communicate effectively with the central processing unit.
A computer consists of both hardware and software acting as instructions that perform specific tasks. Operating systems manage resource allocation and enable the initial booting of the machine. Applications are specialized tools, like Microsoft Office or social media platforms, that serve the specific needs of the user. While the system can function with various applications, it cannot operate at all without an underlying operating system.
Software is governed by legal documents called licenses that regulate its use and distribution. Trial versions allow for limited testing before a purchase, while proprietary software remains strictly owned and protected by copyrights. Open-source models, such as the Android operating system, provide free versions that developers can modify. Every user must agree to the End-User License Agreement (EULA) during the installation of any program.