i totally disagree with the explanation from Mr Sengupta as this logo is recognizable in the world cause of the hard work wipro had done and not for the Logo ... secondly there is no such faminine feeling in the rainbow colored logo. its just that now the wipro is big so the designer can describe that logo in anyway they want. apart from Wipro there are so many Big companies which have there logo simply writen that too in normal fonts still they are recognizable in the world. so its not the logo that create a brand its the work that company do that create the recognision.
