When creating systems , it is essential to understand the contrasting roles of high-level design and LLD . HLD provides a broader picture of the system , illustrating the principal components and their interactions without specific execution specifics. On the other hand, LLD descends into the techni
How Indian Shops Are Speeding Up Billing With 2D Barcode Scanners and Thermal Printers
Walk into any busy kirana store, pharmacy or cafe in India today and watch the billing counter. The shops with short queues all have two machines in common: a 2D barcode scanner and a thermal receipt printer. Together they cost less than a smartphone, and they change how fast a counter moves. A 2D