The task is to locate, organise, and synthesise peer-reviewed research demonstrating how high-tech augmentative and alternative communication delivered through a tablet—specifically an iPad running text-to-speech or symbol-based speech apps (or non-iPad high-tech AAC)—benefits children under five who cannot rely on natural speech. My priority is evidence on two fronts: • measurable improvements in the child’s expressive or receptive communication, and • effects on social engagement with parents, siblings, and peers. Any study design is welcome so long as it meets academic standards; I am particularly interested in longitudinal research, single or multiple case studies, and clinical trials. Grey literature is unnecessary for this round; stick to indexed journals and conference proceedings. Deliverables 1. An annotated bibliography (Word or Google Doc) with full APA citations, PubMed/DOI links, participant ages, AAC app or software named, study design, reported outcomes, and key findings for each article. 2. A summary matrix (Excel or Google Sheet) for quick comparison across studies. 3. A concise narrative synthesis (2-4 pages) highlighting overall trends, strengths, and research gaps in using iPad-based AAC with children under five. Acceptance criteria: at least 15 unique studies that match all inclusion criteria, all citations verifiable through databases such as PubMed, PsycINFO, or Scopus, and adherence to APA formatting.