in what ways were slaves used in the islamic world?

Answer 1

Same as everywhere else; agriculture, crafts, and housework...

Answer 2

In Islam, the Qur'an accepts and endorses the institution of slavery, and Muhammad owned slaves (his actions are religiously binding through the Hadith). The slavery endorsed by the Qur'an limited the source of slaves to those captured in war and those born of two slave parents.The Qur'an considers emancipation of a slave to be a meritorious deed, yet nationwide emancipation did not occur in Muslim lands until post-WWII, with pressure exerted by Western nations such as Britain and France to secularise. Some Islamic nations have been among the last to outlaw slavery
http://en.wikipedia.org/wiki/Slavery#Religion_and_slavery

more informations on slavery in islam category might be found here:
http://en.wikipedia.org/wiki/Special:Search?search=slave+islam

Answer 3

it's a shame on me bcoz i can't answer ur question. i am a muslim still can't answer it.