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Microsoft's simplified BASIC dialect designed for beginners learning to program. Features a minimal API.
Microsoft introduced Small Basic in 2008 as a free, simplified programming environment designed to make coding accessible and enjoyable for absolute beginners, particularly students and children. Created by Vijaye Raji, Small Basic strips away the complexity of professional languages, offering just 14 keywords and a clean, unintimidating IDE with IntelliSense that guides learners through available commands. The language provides immediate visual feedback through its Turtle graphics library (inspired by Logo), a GraphicsWindow for drawing shapes and animations, and a TextWindow for console-style programs.
Small Basic includes built-in objects for network operations, file handling, mouse and keyboard input, image manipulation, and even interfacing with Flickr for image search — all accessible through a discoverable, dot-notation API. Programs compile to .NET executables, meaning students can share their creations as standalone applications. The Small Basic ecosystem includes a curriculum guide aligned with computer science education standards, an online community where users share and remix programs, and a publishing feature that generates unique program IDs for easy sharing.
Microsoft's educational philosophy with Small Basic emphasizes the transition path — students start in Small Basic and graduate to Visual Basic, C#, or Python as their skills develop. The language has been translated into over 20 languages, supporting computer science education worldwide. While newer block-based tools like Scratch have captured younger audiences, Small Basic occupies a unique niche as a textual programming introduction that is simpler than Python yet produces real compiled programs.
Small Basic's educational context makes tracking code evolution particularly important for instructors assessing student progress. Comparing Small Basic files catches modifications to algorithm implementations across assignment iterations, differences between student submissions and reference solutions, and changes to shared community programs that others have forked and modified.
Educators reviewing incremental student work need clear diffs to identify which logical steps a student added or corrected between submissions.
UtraDiff compares Small Basic files with syntax highlighting for keywords like Sub, EndSub, If/Then/Else, For/EndFor, and object method calls such as TextWindow.WriteLine. Side-by-side view reveals how program logic changes between lesson iterations, making modified control flow and variable assignments clearly visible.
Inline view consolidates changes to subroutine bodies. Alt+arrow navigation jumps between changed code blocks, supporting educational code review for beginning programmers.
Supported extensions: .sb