Amazon.com, Inc.

are in a listen-only mode. After the presentation, we will conduct a question and answer session. Today's call is being recorded. For opening remarks, I'll be turning the call over to the Director of Investor Relations, Dave Files. Please go ahead.

Hello, and welcome to our Q4 2018 Financial Results Conference Call. Joining us today to answer your questions is Brian Olsoski, our CFO. As you listen to today's conference call, We encourage you to have our press release in front of you, which includes our financial results as well as metrics and commentary on the quarter. Please note, unless otherwise stated, all comparisons in this call will be against our results for the comparable period of 2017. Our comments and responses to your questions reflect management's views as of today, January 31st, 2019 only, and will include forward-looking statements. Actual results may differ materially. Additional information about factors that could potentially impact our financial results is included in today's press release and our filings with the SEC, including our most recent annual report on Form 10-K and subsequent filings. During this call, we may discuss certain non-GAAP financial measures. In our press release, slides accompanying this webcast and our filings with the SEC, each of which is posted on our IR website, you will find additional disclosures regarding these non-GAAP measures, including reconciliations of these measures with comparable GAAP measures. Our guidance incorporates the order trends that we've seen to date and what we believe today to be appropriate assumptions. Our results are inherently unpredictable and may be materially affected by many factors, including fluctuations in foreign exchange rates, changes in global economic conditions and customer spending, world events, the rate of growth of the internet, online commerce and cloud services, and the various factors detailed in our filings with the SEC. Our guidance also assumes, among other things, that we don't conclude any additional business acquisitions, investments, restructurings, or legal settlements. It's not possible to accurately predict demand for our goods and services, and therefore, our actual results could differ materially from our guidance. With that, we will move to Q&A. Operator, please remind our listeners how to initiate a question.

At this time, we will now open up the call for questions. We ask each caller, please limit yourselves to one question. If you would like to ask a question, please press star 1 on your keypad. We ask that when you pose your question, you pick up your handsets to provide optimum sound quality. Once again, to initiate a question, please press star, then 1 on your touchtone telephone at this time. Please hold while we pull for your questions. Thank you. Our first question comes from the line of Justin Post with Merrill Lynch. Please proceed with your question.