Codebook existed before VFP3.

>Interesting. In the Visual Foxpro 3 Codebook, it says that the codebook's standards are based on Microsoft's Hungarian Notation. I suppose they were only referring to the concept and not necessarily the character representations themselves.
>
>Alan
>
>>>Hi All,
>>>
>>>Like many of you, I use the t prefix to reference parameters or arguments. Does anyone know why t and not a (argument) or p (parameter)?
>>
>>The t was first codified for xBase in Flash Creative Management's "Coding Standards and Guidelines", later incorporated into the first Codebook.
>>
>>yag chose t for parameTer and g for Global to avoid confusion between Public and Private.
>>
>>Dan