Both QR code and barcode are instruments used to gather data about specific entities. The QR code is a two-dimensional encoding, whereas a barcode is one dimensional in nature.

Both qHD and QHD are popular HD viewing formats. However, the differences between the two are not as subtle as the capitalization of an alphabet in their titles.

Both qHD and HD are formats used to display high quality images on an HD enabled screen. However, both these formats differ in their resolutions and coverage of devices.

qHD stands for quarter high definition, and is one fourth of full high definition, or full HD, hence the name qHD. Both these resolutions differ in terms of their measurement as well.

GSM stands for “Global system for Mobile communications”. It is a specification of wireless network infrastructure. The system has been developed by the European Telecommunications Standards Institute. GPS...