Visual Basic Naming Rules Use the following rules when you name procedures, constants, variables, and arguments in a Visual Basic module: •You must use a letter as the first character. •You can't use a space, period (.), exclamation mark (!), or the characters @, &, $, # in the name. •Name can't exceed 255 characters in length. •Generally, you shouldn't use any names that are the same as the functions, statements, and methods in Visual Basic. You end up shadowing the same keywords in the language. http://msdn.microsoft.com/en-us/library/office/ee440536(v=office.12).aspx Python Variable Naming Rules: 1. Must begin with a letter (a - z, A - B) or underscore (_). 2. Other characters can be letters, numbers or _ only.
3. Variable names are Case Sensitive. 4. There are some reserved words which we cannot use as a variable name because Python uses them for other things.
These are: and,del,from,not,while,as,elif,global,or,with,assert,else,if,pass,yield,break,except,import,print,break,except,import,print,class,exec,in,raise,class,exec,in,raise,continue,finally,is,return,continue,finally,is,return,def,for,lambda and try. http://www.programr.com/python-variable-naming-rules General Naming Conventions for Java.
Names representing packages should be in all lower case. Package naming convention used by Sun for the Java core packages. The initial package name representing the domain name must be in lower case. Names representing types must be nouns and written in mixed case starting with upper case.

Variable names must be in mixed case starting with lower case. Common practice in the Java development community and also the naming convention for variables used by Sun for the Java core packages. Makes variables easy to distinguish from types, and effectively resolves potential naming collision as in the declaration Line. 5. Names