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BC 400 – Invention of Brahmilipi , the mother of all Indian language except Urdu.

100 AD – Invention of Kharosti language and alphabets, the mother of all Arabic

languages including Urdu

1450AD – The Second Information revolution – Invention of rotating press by a German Mechanic named Gutenburg.

1833AD – Michael Faraday made the earliest study of semiconductors.

1834AD – Charles Babbage plans a machine to calculate and print results.

1842AD – Ada Lovelace writes a step by step Programme for Babbage’s Machine.

1850AD – George Boole invented Boolean Algebra. Boolean Algebra is the basis of the

present set of Computer Systems which use ALGORITHMIC

PROGRAMMING as opposed to HEURISTIC PROGAMMING of

Artificial Intillegence Computers. Heuristics programming uses Predicate

Logic. Heuristics means working by rule of thumbs and it is self learning

programme. In contrast Algorithm means a set of sequential steps which are

repeated or iterated. Here there is no self learning involved.

1851AD -First successful commercial telegraph cable laid from England to France. The cable had a central core of copper wire, gutta-percha, tarred yarn, tarred hemp, and iron wires.

1858AD -First transatlantic telegraph cable.

1876AD – Alexander Graham Bell invented Telephone.

1895AD – J.J Thomson discovers electron as the basic building block of Atom through

the study of Cathode Ray;

1902-1906AD - Telegraph cable crosses the Pacific ocean.

1904AD- John Ambrose Fleming invents Vacuum Tube Diode(two electrodes device).

1906AD- Lee De Forest invented Vacuum Triode ( three electrodes device) and used it to

achieve RC coupled Amplifier. Subsequently four electrodes device tetrode and

five electrodes device pentode.

1911AD- Using Heaviside “Distortion-less Transmission Condition” i.e. loading the

Telephone cables with large inductors, first long distance telephone call was

made from New York to Denver, Colorado, over a distance of 2000 miles.

1913AD- Vacuum Tube Repeater introduced in Public Service Telephone

Network (PSTN).

1915AD- Using inductor loading&R.C Coupled Amplifier, first transcontinental

telephone call is made from New York to San Francisco across a distance of

4000miles. Telephone becomes a Public Utility Service.

1918AD- Two Frenchmen, Block&Abraham, build the first simple Calculator-a

calculator with programme storage and data storage facility is a computer.

1937AD -Alan Turing invents “The Turing Machine “- it can perform all logical tasks.

1943AD- To decipher encrypted messages, British Scientist build “Colossus”-

forerunners of Electronic Computers.

1945AD- IBM builds first full scale calculator, MARK-I.

1945AD- ENIAC (Electronic Numerical Integrator&Calculator) build by Moore School

of Electrical Engineering at the University of Pennsylvania. ENIAC is 27Metric Tonnes , consumes 200kW and occupies a large room. The valves failed at a rate of one every 10 minutes and ENIAC had 18,000 valves. So development of user friendly home Computers was a pipe dream at that time. Development could not take place using Thermoionic Valves.

1945AD- Microwave Telephone link established.

Questions & Answers

what is mutation
Janga Reply
what is a cell
Sifune Reply
how is urine form
Sifune
what is antagonism?
mahase Reply
classification of plants, gymnosperm features.
Linsy Reply
what is the features of gymnosperm
Linsy
how many types of solid did we have
Samuel Reply
what is an ionic bond
Samuel
What is Atoms
Daprince Reply
what is fallopian tube
Merolyn
what is bladder
Merolyn
what's bulbourethral gland
Eduek Reply
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
what is heart
Konadu Reply
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
Pelagie Reply
what is the causative agent of malaria
Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
Achiri Reply
in the mouth
EZEKIEL
what are the functions of follicle stimulating harmones?
Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
what's biology?
Egbodo Reply
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
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Source:  OpenStax, Solid state physics and devices-the harbinger of third wave of civilization. OpenStax CNX. Sep 15, 2014 Download for free at http://legacy.cnx.org/content/col11170/1.89
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