Key card envelopes are a popular envelope for storing any credit card sized item, from a hotel key entry card, to a gift card, or even an employee ID. These small envelopes are slightly larger than a credit card, and have what is called a double thumb_cut, or a slot at one end where you can pull the card out. While most of these envelopes are used for hotel keys (hence the name), there are many other applications for key card envelopes.
In earlier times, accounting was done manually. With the coming of computers and increased technological advancement, accounting is slowly transferring from manual to mechanical dependence. It saves a lot of time. Earlier, hours were spent on drawing the basic design of sheets and other financial instruments. But now, you have access to balance sheet templates, which have readymade categories and spaces for computing. Now, one just has to enter the amounts manually and all other things are done mechanically.