Database
Data in Spreadsheets & Grids
How To Use IndexDB – Code And Example « Ido's Blog
IndexedDB is an evolving web standard for the storage of significant amounts of structured data in the browser and for high performance searches on this data using indexes. IndexedDB leaves room for a third-party JavaScript library to straddle the underlying primitives with a BTree API, and I look forward to seeing initiatives like BrowserCouch built on top of IndexedDB.