Jeff Sutherland describes 3 types of scrums A, B and C in progressing levels of maturity.

Jeff didn't invent this stuff btw, Toyota and a whole bunch of really smart japanese manufacturers did.

Jeff just puts it into words and a nice little package/framework called scrum along side Ken Schwaber and Mike Beedle.

Anyhow, the three types:

Regarding Type A scrum :

Documents (artifacts sometimes they're called):

Sprint Backlog, Product Backlog, and Burn down chart.

Ceremonies: Sprint planning, scrum(standup, daily) meeting, sprint review

Roles: Product owner, Scrum master, team

Technically, if you 'have' these at all, then you're doing scrum.

However, do you have any improvements to make on them? sure, why wouldn't we :)

Over the next few days, i'm going to start going down the list more in depth and reflective over the past few years of my utilizing 'scrum' (even when sometimes i didn't know that's what it was).