Usability testing is the measurement of ease of use of a product or piece of software. In contrast, usability engineering (UE) is the research and design process that ensures a product with good usability. Usability is a non-functional requirement.
I think in modern world you can associate with only one thing, but it's not the best choice. Bulgarians speak Slavic language as mother tongue, but also many of us speak a Germanic language (English). We have always been part of the Mediterranean world and are pred.Pontid in race, a Med subtype. think in modern world you can associate with only one thing, but it's not the best choice. Bulgarians speak Slavic language as mother tongue, but also many of us speak a Germanic language (English). We have always been part of the Mediterranean world and are pred.
Bulgaria, Lev. The Bulgarian Lev is the currency of Bulgaria. Our currency rankings show that the most popular Bulgaria Lev exchange rate is the BGN to GBP rate. The currency code for Leva is BGN, and the currency symbol is Ð»Ð². Below, you'll find Bulgarian Lev rates and a currency converter.