Universally accepted system of writing used by and for blind persons and consisting of a code of 63 characters, each made up of one to six raised dots arranged in a six-position matrix or cell.

Tim Berners-Lee invented the _________ in 1990 which is the most common means of accessing data online in the form of websites and hyperlinks.

The history of ______ dates back almost 2,000 years to when inventors in China first crafted cloth sheets to record their drawings and writings.

Invented in 1913 by Fred W. Wolf Jr, the DOMELRE was the first successful, mass marketed ________________

Gabriel Fahrenheit (1686-1736) was the first person to make a __________ using mercury.

Hans and Zacharias Janssen invented the first compound ______ in the late 16th century when they discovered that, if they put a lens at the top and bottom of a tube and looked through it, objects on the other end became magnified.

In Germany, around 1440, goldsmith Johannes Gutenberg invented the _____ press, could produce up to 3,600 pages per workday. which

The _______ was discovered by Alexander Flemming in 1928 and is now the most widely used antibiotic in the world.

Evidence indicates the ______ was created around 3500 B.C. in Mesopotamia to be used by potters—300 years before someone figured out to use them for chariots.

Alexander Graham Bell patented the first one in 1876, although here were many other inventors such as Elisha Gray and Antonio Meucci who also developed a talking telegraph.

The first commercially successful ___________ was patented by Thomas Edison in 1879