Quick Response Codes are 2-dimensional barcodes, which can be used for many things. Data are encoded into a graphical format which then can be read by a camera and evaluated using special apps (barcode readers). Example usages include linking to web pages or exchanging contact data. See the 'info' ...
I run a small business repairing computers. Sometimes I have very similar looking computers, and shenanigans ensue if the customer labels fall off or the serial numbers I record become detached from ...
Especially in Japan/Korea, there are many proprietary apps to quickly share your name+email+phone. Example here. They all work the same way: At first use, enter your name, email, phone: It generates ...