It is important to distinguish the difference between IT policies, standards and procedures.
Policies set the corporate direction - such as the management decision to purchase software whenever possible rather than write it in-house (or vice versa!).
Standards are criteria against which you measure something. Coding standards are used to define what types of programming languages should be used, how the code should be documented, the use of corporate methodologies, testing requirements, etc.
Procedrues are documents that provide step-by-step instructions for how to do something. Procedure manuals may contain standards within them, but more often there is a coprorpate Policies, Standards and Best Practices manual that applies throughout the company. The procedure manuals are usually associated with specific departments or business applications.
You can have procedures without have any policies or standards. However, the procedures wont' be as good as they could be. In fact, one of the first standards you should have is for your documentation (format, style, font, size, headers and footers, use of table of contents, etc.) This insures that all your documentation has the same "look and feel" and are easy to maintain.
Programming standards are vital for any serious IT organization, and these should include naming convention standards. Quality standards should be defined for all products and services.
Many companies have policies and standards on the tools and products that used in the company. For instance, you don't want people in the company using several differnt email systems or word processing programs, because this inhibits communications and requires extra support personnel.
Of course, there are also hardware and network standards to consider. Standards can apply to almost anything you do.