The company's memorandum and articles (see question 11) may allow the company to issue different classes of shares. For example, some companies issue both voting and non-voting shares. This can be useful if you want to issue shares to other investors but retain voting control.
As a shareholder, you will only have the rights attached to the class of shares that you own. The rights attached to a class of shares cannot be altered unless the holders of at least three-quarters of the class shares consent (unless the company's articles say otherwise).
