A compiler.
The email program does not support it for text entry, but other programs such as Pages do. Each program does it differently.
The program Scratch is easier then most other programing. Its way easier for beginners to use because this is there first program. The people that do use other programs at first they say its really hard then they get better and they don't want to change programs because they already learned one.
Visual Basic is a powerful programming language used to make programs for use with Windows. VB can make from either the simplest, to the most advanced programs. Visual Basic is very easy to learn compared to other languages.
There are a few programs out there that offer the ability to make phone calls to a PC. The most popular program that people around the world use is Skype.
You really only need Microsoft Word but there are many other programs that you can buy to do so. Blue squirrel and Hot print are both good programs to use.
comments are used in programs to make the program more user friendly. The comment lines will not effect the execution speed of the program.
MS Office is a collection of application programs. Many other programs can link to data or imbed office objects.
Software designers and computer programmers.Computer Programmer. All computer programmers use math, logic, and other means to make their program. Depending on what the purpose of the program they dive into the sciences.
There are many programs to make ringtones. Either use the one that is in your mobile or check: www.free-ringtone-maker.com
A couple simple programs you can use are, Microsoft Word or Microsoft Powerpoint to make a newspaper as it normally has templates you can use to make a base and layout. I hope this answered your question :)
If you mean what I think you mean...you can use Audacity, which is a free way, but there are tons of programs that do this.
There are many different varieties of programs available that one can use to make slides. The most popular programs include Open Office Impress and Microsoft Powerpoint.