Bolon Kaiji

Catheter:ThomasJ. Fogarty(1934- )American.

Clinometer(Inclinometer)/ (Tilt meter): (A clinometer is an instrumentthat is used for measuring the angle or elevation of slopes)

Crystadine:OlegLosev(1903-1942)Russian.

Dalén light:Nils Gustaf Dalén(1869-1937) Swedish.

Equatorium: (An equatorium (plural, equatoria) is anastronomical calculating instrument)AbūIshāq Ibrāhīm al-Zarqālī(Arzachel)(1028-1087)Islamic Spain.

Incandescentlight bulb: (withtungsten filament)Alexander Lodygin(1847-1923)Russian.

Keyboard(Computer):ChristopherLatham Sholes(1819-1890) American 1873; (the modern computerkeyboard first invented by the Englishman Henry Mill (1683-1771) in 1714 (Historyof Computers and Computing, Birth of the modern computer).

Microprocessor(Computer):Intel engineers:FedericoFaggin(1941)Italian-American;MarcianHoff(1937-) AmericanandStanleyMazor(1941- ) Chicago-American.

Monitor(Display device)/cathode ray tubes(Computer):KarlFerdinand Braun(1850-1918) Germany 1897

Motherboard(Computer):Apple1990.

Mouse(Computer):Douglas Engelbart(1925-2013) American1968.

Muralinstrument:Muhammadibn Musa al-Khwarizmi(Algoritmi) (780-850).

Nikonos(underwater camera):JacquesCousteau(1910-1997)(co-inventor) French.

Octant(অর্র্ধপাদ);John Hadley(1682-1744)EnglishandThomas Godfrey(1704-1749)American colonies1730.developedbyJohn Campbell(1720-1790)English 1757.

Rackrailway system:Carl Roman Abt(1850-1933) Swiss.

Sextant:(সেক্সট্যান্ট) (A sextant is a doubly reflecting navigationinstrument used to measure the angle between any two visible objects)John Hadley(1682-1744)EnglishandThomas Godfrey(1704-1749)American colonies1730.developed by;John Campbell(1720-1790)English 1757.

Sicknessbag:(also known as a sick sack, airsick bag, airsickness bag, emesisbag, sick bag, barf bag, vomit bag or motion sickness bag)GilmoreSchjeldahl(1912-2002)American.

Sine quadrant:Muhammadibn Musa al-Khwarizmi(Algoritmi) (780-850).

Solarvalve:Nils Gustaf Dalén(1869-1937) Swedish.

Sonics theories:GeorgeConstantinescu(1881-1965)Romania.