OPERATION AND SUPPORT SYSTEM (OSS)

Hello
Im new on this forum and I do not know much about GSM. Can any one help me with OSS, I dnt have its software and I would like to install it to my computer and play around with its features just to familiarise myself with it or You can send me any document (containing pictures showing features of OSS) that explains every thing about OSS. I would be glad to receive responds. Thank you