Computer Science

FAT stands for File Allocation Table. It is a simple file system originally designed for floppy disks and later used in MS-DOS and early Windows versions to keep track of file storage locations on a disk.

Lotus 1-2-3 spreadsheet files use several extensions depending on the version, including .WKS, .WK1, .WK2, .WK3, .WK4, and .123. Among the given options, .123 is a valid extension associated with Lotus 1-2-3 files.

The Operating System manages all file-related operations such as creating, deleting, organizing, reading, and writing files on storage devices. It provides a file system that acts as an interface between the user and the physical storage hardware.

Dennis Ritchie developed the C programming language at Bell Laboratories in the early 1970s. He is widely regarded as the 'Father of C' and also co-created the Unix operating system.

Spreadsheets are electronic forms used to organize, calculate, and analyze data in rows and columns. Applications like Microsoft Excel and Google Sheets are common examples of spreadsheet software.

Fifth generation computers (present and future) are based on Artificial Intelligence (AI). They aim to develop machines that can understand natural language, have learning capabilities, and use parallel processing with superconductors and ultra-large-scale integration (ULSI).

Non-numeric (qualitative) data consists of text or descriptive information that cannot be used in mathematical calculations. Employee address is non-numeric, whereas examination score and bank balance are numeric (quantitative) data.

Output devices are hardware components that receive data from the computer and present it to the user. Common examples include the monitor/screen (displays visuals), printer (produces hard copies), and speakers (output sound).

FDD stands for Floppy Disk Drive. It was a common data storage device used in early personal computers to read and write data on removable floppy disks (5.25" or 3.5").

Analog to analog conversion involves modulating an analog signal (such as voice or music) onto another analog carrier signal. Radio broadcasting (AM/FM) is a classic example where audio signals are modulated for transmission over airwaves.