with internet punctuations use is much lesser eg Mr is without period. this is open. closed is used of such punctuations where some goody-2-shoes insist in using such punct. standard punct is the one used in old standard english where so many commas r used. nowadays grammar is descriptive rather than prescriptive as its changing with times

The vocabulary in own letters has a tendency to be greater comfortable than what’s modern in business company letters. that’s because of the fact their important objective is regularly friendly verbal substitute. Slang words and trite sayings even tend to be nice in own letters because of the casual tone modern. a good occasion is a letter to a pen pal. business company letters, on the different hand, tend to be written for the objective of conversing with or interior a company (like a business company or a school) with a view to accomplish a business company request or transaction. as an occasion, in case you wrote a grievance to a business company, you may use formal vocabulary for the reason which you like the business company to amend a prepare or handle a controversy. you do no longer in my opinion understand the staff examining the letters the two, so a ideal tone facilitates a reader to be taken heavily. The formal vocabulary of a business company letter additionally expresses professionalism interior a workplace. as an occasion, if a CEO needs to handle his subordinates in his business company by a letter, he could gain this with formal language with a view to maintain a expert tone.