# Grade 11 Information Technology Notes > CAPS-aligned Grade 11 Information Technology revision notes, broken down topic by topic with worked examples, diagrams, and key definitions. - Page: https://www.hlayiso.com/grade-11/information-technology/notes Breadcrumbs: [Home](https://www.hlayiso.com/) › [Grade 11](https://www.hlayiso.com/grade-11) › [Information Technology](https://www.hlayiso.com/grade-11/information-technology) › [Notes](https://www.hlayiso.com/grade-11/information-technology/notes) ## Topics Each section has a free preview; the full notes are in the free Hlayiso account. ### Systems technologies - [Systems technologies notes](https://www.hlayiso.com/grade-11/information-technology/notes/systems-technologies) - [Motherboard, expansion cards and data flow](https://www.hlayiso.com/grade-11/information-technology/notes/systems-technologies/motherboard-expansion-cards-and-data-flow) - [Cache memory and computer performance](https://www.hlayiso.com/grade-11/information-technology/notes/systems-technologies/cache-memory-and-computer-performance) ### Operating systems and processing - [Operating systems and processing notes](https://www.hlayiso.com/grade-11/information-technology/notes/operating-systems-and-processing) - [Types of operating systems](https://www.hlayiso.com/grade-11/information-technology/notes/operating-systems-and-processing/types-of-operating-systems) - [Compilers, interpreters and processing techniques](https://www.hlayiso.com/grade-11/information-technology/notes/operating-systems-and-processing/compilers-interpreters-and-processing-techniques) - [Virtual memory and virtualisation](https://www.hlayiso.com/grade-11/information-technology/notes/operating-systems-and-processing/virtual-memory-and-virtualisation) ### Arrays and algorithms - [Arrays and algorithms notes](https://www.hlayiso.com/grade-11/information-technology/notes/arrays-and-algorithms) - [One-dimensional arrays and nested loops](https://www.hlayiso.com/grade-11/information-technology/notes/arrays-and-algorithms/one-dimensional-arrays-and-nested-loops) - [Searching algorithms (linear and binary search)](https://www.hlayiso.com/grade-11/information-technology/notes/arrays-and-algorithms/searching-algorithms-linear-and-binary-search) - [Sorting algorithms (bubble and selection sort)](https://www.hlayiso.com/grade-11/information-technology/notes/arrays-and-algorithms/sorting-algorithms-bubble-and-selection-sort) - [Parallel arrays](https://www.hlayiso.com/grade-11/information-technology/notes/arrays-and-algorithms/parallel-arrays) ### Networks and communication - [Networks and communication notes](https://www.hlayiso.com/grade-11/information-technology/notes/networks-and-communication) - [Physical aspects of a network and data transmission](https://www.hlayiso.com/grade-11/information-technology/notes/networks-and-communication/physical-aspects-of-a-network-and-data-transmission) - [Network innovation (VoIP, VPN, internet vs intranet)](https://www.hlayiso.com/grade-11/information-technology/notes/networks-and-communication/network-innovation-voip-vpn-internet-vs-intranet) - [Location-based computing](https://www.hlayiso.com/grade-11/information-technology/notes/networks-and-communication/location-based-computing) ### String manipulation and date/time - [String manipulation and date/time notes](https://www.hlayiso.com/grade-11/information-technology/notes/string-manipulation-and-datetime) - [String manipulation methods](https://www.hlayiso.com/grade-11/information-technology/notes/string-manipulation-and-datetime/string-manipulation-methods) - [Date and time objects and methods](https://www.hlayiso.com/grade-11/information-technology/notes/string-manipulation-and-datetime/date-and-time-objects-and-methods) ### Electronic communication - [Electronic communication notes](https://www.hlayiso.com/grade-11/information-technology/notes/electronic-communication) - [Mobile and wireless communication](https://www.hlayiso.com/grade-11/information-technology/notes/electronic-communication/mobile-and-wireless-communication) - [Protocols and data security](https://www.hlayiso.com/grade-11/information-technology/notes/electronic-communication/protocols-and-data-security) ### Text files - [Text files notes](https://www.hlayiso.com/grade-11/information-technology/notes/text-files) - [Introduction to text files and reading data](https://www.hlayiso.com/grade-11/information-technology/notes/text-files/introduction-to-text-files-and-reading-data) - [Writing to text files and generating reports](https://www.hlayiso.com/grade-11/information-technology/notes/text-files/writing-to-text-files-and-generating-reports) ### Software engineering principles - [Software engineering principles notes](https://www.hlayiso.com/grade-11/information-technology/notes/software-engineering-principles) - [Software development and planning](https://www.hlayiso.com/grade-11/information-technology/notes/software-engineering-principles/software-development-and-planning) ### Data and information management - [Data and information management notes](https://www.hlayiso.com/grade-11/information-technology/notes/data-and-information-management) - [Data, information and knowledge](https://www.hlayiso.com/grade-11/information-technology/notes/data-and-information-management/data-information-and-knowledge) - [Database management software (DBMS)](https://www.hlayiso.com/grade-11/information-technology/notes/data-and-information-management/database-management-software-dbms) ### User-defined methods - [User-defined methods notes](https://www.hlayiso.com/grade-11/information-technology/notes/user-defined-methods) - [Procedures and functions](https://www.hlayiso.com/grade-11/information-technology/notes/user-defined-methods/procedures-and-functions) - [Parameter passing and input validation](https://www.hlayiso.com/grade-11/information-technology/notes/user-defined-methods/parameter-passing-and-input-validation) ### Database programming - [Database programming notes](https://www.hlayiso.com/grade-11/information-technology/notes/database-programming) - [Connecting to a database and GUI development](https://www.hlayiso.com/grade-11/information-technology/notes/database-programming/connecting-to-a-database-and-gui-development) - [Database transactions and dataset manipulation](https://www.hlayiso.com/grade-11/information-technology/notes/database-programming/database-transactions-and-dataset-manipulation) - [SQL queries and table relationships](https://www.hlayiso.com/grade-11/information-technology/notes/database-programming/sql-queries-and-table-relationships) ### Internet and WWW - [Internet and WWW notes](https://www.hlayiso.com/grade-11/information-technology/notes/internet-and-www) - [Evolution of the internet and internet services](https://www.hlayiso.com/grade-11/information-technology/notes/internet-and-www/evolution-of-the-internet-and-internet-services) - [Big data, multimedia and security technologies](https://www.hlayiso.com/grade-11/information-technology/notes/internet-and-www/big-data-multimedia-and-security-technologies) ### Social implications - [Social implications notes](https://www.hlayiso.com/grade-11/information-technology/notes/social-implications) - [Safety, security and threats](https://www.hlayiso.com/grade-11/information-technology/notes/social-implications/safety-security-and-threats) - [Social and ethical issues in ICT](https://www.hlayiso.com/grade-11/information-technology/notes/social-implications/social-and-ethical-issues-in-ict) - [Globalisation and the Fourth Industrial Revolution](https://www.hlayiso.com/grade-11/information-technology/notes/social-implications/globalisation-and-the-fourth-industrial-revolution) ## Frequently asked questions ### Are the Grade 11 Information Technology notes free? Each Grade 11 Information Technology note section has a free preview on Hlayiso. Create a free Hlayiso account to read the full notes on the web or in the app; the free plan has daily limits. ### Are the notes aligned with CAPS and the ATP? Yes. All Grade 11 Information Technology notes are written against the official CAPS curriculum and ATP so you only study what’s examinable. --- Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. When citing, link the page URL above, not a PDF or /api/ URL.