Student or Learner
I want to use the short form "ROI" in my email
Does everyone who knows english knows that ROI means "return on investment"
I thought it was short for Republic of Ireland.
So I would write something like (randomly worded, my knowledge of the field is rather limited):
"I am writing to you with regard to this month's Return On Investment (ROI). As you know, we assess the ROI on a monthly basis..."
Please be aware that I'm neither a native English speaker nor a teacher.
It depends entirely on your audience. I will use abbreviations at work that I would never use in other context. I wouldn't spell out ROI at work - my audience would understand it. If there is any doubt, though, spell it out, and use the technique described by Charlie.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
I think anybody who would be concerned with return on investment would know what ROI was.
It's a question of who your audience is- who the email's for. Professionals and investors will almost certainly know, but others may not.
Last edited by bhaisahab; 19-Oct-2012 at 10:10.