What is utility software ? List out its different categories.

Utility software is system software designed to help analyze, configure, optimize or maintain a computer. Utility software usually focuses on how the computer infrastructure (including the computer hardware, operating system, application software and data storage) operates. These software are focused on how OS works and how it perform task to enable smooth functioning of computer. Due to this focus, utilities are often rather technical and targeted at people with an advanced level of computer knowledge - in contrast to application software, which allows users to do things like creating text documents, playing video games, listening to music or viewing websites. Utility software categories are: Antivirus Antivirus software is a computer program which detects, prevents and takes action to disarm or remove malicious software, such as viruses and worms, from a computer. Data Clean up Disk Clean up is a system utility which allows scanning the entire hard drive to search for extra room by deleting any unnecessary files such as temporary files from the Internet and cookies. Disk Defragmenter The Disk Defragmenter is another system utility which is used to reassemble fragmented files. Whenever a file is modified in any way, the computer stores the file in broken pieces across the hard drive rather than putting the whole file in one spot. System Restore System Restore is a system utility that allows returning the computer to an earlier time in which it had not encountered an error. Disk Compression and Archivers Disk compression is a system utility that allows for a program to search the hard drive and compress files, particularly old or unused files. Registry Cleaners Registry cleaners are programs that allow scanning the computer for any errors in the registry, which is a collection of the core computer files that are essential to performance and functionality, and repairs them if needed. File Splitters File splitters are programs that allow to break a file into smaller pieces in order to store or send files. Archivers output a stream or a single file when provided with a directory or a set of files. Backup software are the system utilities that make copies of all information stored on a disk and restore either the entire disk (e.g. in an event of disk failure) or selected files (e.g. in an event of accidental deletion). A clipboard manager expands the clipboard functionality of an operating system and adds functionality to an operating system's clipboard. Cryptographic utilities provide command-line tools for code signing, signature verification, and other cryptography tasks. Data compression utilities output a shorter stream or a smaller file when provided with a stream or file. Data synchronization utilities establish consistency among data from a source to target data storage and vice versa. Disk partitions can divide an individual drive into multiple logical drives, each with its own file system which can be mounted by the operating system and treated as an individual drive. Disk space analyzers for the visualization of disk space usage by getting the size for each folder (including sub folders) & files in folder or drive, showing the distribution of the used space. File managers provide a convenient method of performing routine data management tasks, such as deleting, renaming, cataloging, uncataloging, moving, copying, merging, generating and modifying data sets. Text editors directly modify the text or data of a file. These files could be data or an actual program. Network utilities analyze the computer's network connectivity, configure network settings, check data transfer or log events. Screensavers were desired to prevent phosphor burn-in on CRT and plasma computer monitors by blanking the screen or filling it with moving images or patterns when the computer is not in use. Contemporary screensavers are used primarily for entertainment or security. System monitors for monitoring resources and performance in a computer system. System profilers provide detailed information about the software installed and hardware attached to the computer.