What do you mean by form and type of order?

Religious institutes are divided primarily into two groups: clerical (those founded for priests and their formation only) and lay (all others). These communities are then divided again depending upon the type of vows their members take: orders (solemn vows), and religious congregations (simple vows).

For example, there are priestly orders of men who take solemn vows. They would be in a clerical order, while a man in a community that took solemn vows but whose members could be brothers or priests would be in a lay order. If the community took simple vows it would be a lay congregation.

Of course there are no clerical orders of women religious, but there are communities that take solemn vows (a religious order) and those that take simple vows (a religious congregation). Women who take solemn vows are called nuns. Women who take simple vows are called sisters.