Explore the LR-Technique for constructing a parser from a Context-Free Grammar in this comprehensive 49-minute video. Delve into the intricacies of LR(k) Grammars, starting with an introduction to the concept and progressing through its working principles. Learn about state transitions, nonterminals, and the reduce operation. Understand the challenges of reduce-reduce conflicts and discover how follow sets can help resolve them. Gain insights into LR1 Grammar and its applications. Conclude with a summary of key takeaways and practical implications for parser construction in operating system development.