The pula is the currency of Botswana. It has the ISO 4217 code BWP and is subdivided into 100 thebe. Pula literally means "rain" in Setswana, because rain is very scarce in Botswana—home to much of the Kalahari Desert— playing a major role in rites of traditional Tswana belief; therefore valuable and the word extends its meaning as "blessing" or "fortune". The word also serves as the national motto of the country.
A sub-unit of the currency is known as thebe, or "shield", and represents defence. The names were picked with the help of the public.Wikipedia