guess when answering,one could say most anything,but hello is an acknowledgment that you have received the call.

d.

First use

Many stories date the first use of hello (with that spelling) to around the time of the invention of the telephone in 1876. It was however used in print in Roughing It by Mark Twain in 1872 (written between 1870 and 1871),[2] so its first use must have predated the telephone:

“A miner came out and said: ‘Hello!'”

Earlier uses can be found back to 1849.[3] It was listed in dictionaries by 1883.[1]

The word was extensively used in literature by the 1860s.[4] Two early uses of hello can be found as far back as 1826.[5]

Report on the trade in foreign corn, and on the agriculture of the north of Europe. by William Jacob, 1826. page 213

“On this occasion she switched it on to a patient who was awake and who merely said ‘Hello Sister, what’s the matter with you…'”

Etymology

There are many different theories to the origins of the word. It may be a contraction of archaic English “whole be thou”.[6] Another source may be the phrase “Hail, Thou”, as in the Bible; Luke 1:28 and Matthew 27:14.

Hullo

Hello may also be derived from Hullo. Hullo was in use before hello and was used as a greeting and also an expression of surprise. Charles Dickens uses it in Chapter 8 of Oliver Twist in 1838 when Oliver meets the Artful Dodger:

“Upon this, the boy crossed over; and walking close up to Oliver, said ‘Hullo, my covey! What’s the row?'”

It was in use in both senses by the time Tom Brown’s Schooldays was published in 1857 (although the book was set in the 1830s so it may have been in use by then):

“‘Hullo though,’ says East, pulling up, and taking another look at Tom; ‘this’ll never do…'”

“Hullo, Brown! where do you come from?”

Though much less common than it used to be, the word hullo is still in use, mainly in British English.

Hallo

Hello is alternatively thought to come from the word hallo (1840) via hollo (also holla, holloa, halloo, halloa).[9] The definition of hollo is to shout or an exclamation originally shouted in a hunt when the quarry was spotted:[9]

“If I fly, Marcius,/Halloo me like a hare.” – Coriolanus (I.viii.7), William Shakespeare

Webster’s dictionary from 1913 traces the etymology of holloa to the Old English halow and suggests: “Perhaps from ah + lo; compare Anglo Saxon ealā”.

According to the American Heritage Dictionary, hallo is a modification of the obsolete holla (stop!), perhaps from Old French hola (ho, ho! + la, there, from Latin illac, that way).[10]

Telephone

The word hello is also credited to Thomas Edison specifically as a way to greet someone when answering the telephone; according to one source due to expressing his surprise with a misheard Hullo.[7] Alexander Graham Bell initially used Ahoy (as used on ships) as a telephone greeting.[8] However, in 1877, Edison wrote to T.B.A. David, the president of the Central District and Printing Telegraph Company of Pittsburg:

“Friend David, I do not think we shall need a call bell as Hello! can be heard 10 to 20 feet away. What you think? Edison – P.S. first cost of sender & receiver to manufacture is only $7.00.”

By 1889 central telephone exchange operators were known as ‘hello-girls’ due to the association between the greeting and the telephone.[1]