The word "hi" is correct and usable in written English.
You can use it as a greeting or when you are addressing someone in a formal or informal setting. Example sentence: Hi, I'm Sarah and I'm here to help with any questions you have.
And… "Hi, I'm Ben," says a softly spoken, softly bearded man, offering his hand.
"I basically walk into her office and said, 'Hi.
He posted a short message on the discussion board Hacker News: "Hi, I'm the guy who made a comment about big dongles.
After the rehearsal, Radzi and the show's third host, Lindsey Russell, come to say hi.
At the other end of the scale, HI (Hostelling International, hihostels.com) hostels have always been easy places to meet other travellers.
Susan Pilcher asks: Hi Kevin Is there a film or play that you would now like to re-visit that you played in earlier in your career, be it in the same or another role, now that you have greater wealth of experience and knowledge?
Adrian Ringland, 36, used his hi-tech knowledge to remotely seize control of his victims' computers in order to force them to strip and strike humiliating poses.
Having been fascinated by Artaud for more than a decade, she hi-jacked his prose and made it a vehicle for her own pain and anger.
His farm is already hi-tech, with the laser-guided combine harvester and a satellite-monitored fertiliser regime, but he agrees more is needed.
With feelings running high, the sight of a Network Rail hi-vis jacket beside a level crossing attracts the attention of a man who comes striding across a Suffolk beet field, brandishing an alarmingly large pair of secateurs.
So the Cheesegrater's Popas is a combination of the very good and the not good that is familiar to students of the hi-tech style, of which this is a late flowering.
