Supermarket cashier is not traditionally considered a career path by modern standards. It's a good first job for those just starting out, certainly great summer work for high schoolers, but not something you think of as a stopping point on the path to making an independent living.

Not such the case fifty years ago, when this training film, "Supermarket Cashiers: Ambassadors of Goodwill" was produced. A lot more went into the job, as you'll see. Barcodes had yet to become standard, so all goods' prices had to be manually punched in, along with the proper department each item came from. Errors were easier to make and were more costly. Coupons, checkwriting, price discrepancies -- all the things that take seconds to solve these days could take ages in some situations way back when.

I've been on Twitter now for about three years, and even now I come across little tidbits, tips and tricks about the microblogging site that surprise me or astonish me when I learn they've been around forever.

One such item is the 'modified tweet,' or MT. Many of us, myself included, have glossed over an MT notice in a tweet and just assumed it was a mistype. Actually, this is a very useful tool when you want to retweet someone but have to make a major edit to an original tweet and wish to retain credit.

Here are the basics: Nowadays if you want to retweet someone you have a very helpful button underneath the tweet in question, and in other people's timelines you will see a green tab in the corner of the tweet with your screen name beside it, then the original tweet verbatim below it.

The Florence Police Department is mourning the loss of Public Safety Officer Terry Rhea.

PSO Rhea joined the police department in 2003 and was named Employee of the Year in 2011.

PSO Rhea died Sunday of a heart attack.