On stock Android phones, this is Hangouts by default. Samsung phones come with their own messaging app called "Messages". The keyboard will appear. This is in the lower right corner of the keyboard. The selected emoji will be added to your message. Swipe left or right or tap the category icons at the top of the keyboard to browse through various emoji. Tap the ":-)" button to switch to ASCII formatted emoticons. These can be useful for communicating with non-smartphone users, since they may not be able to render emoji sent from your device. Tap ABC to return to the normal keyboard
++++++++++
One-sentence summary -- Open your messaging app. Tap a conversation. Tap the text field. Tap the smiley icon. Tap an emoji.

One way a tweet that somebody else has written may end up on your profile is if you manually re-post their tweets. This happens when you copy and paste a tweet from another user into a tweet of your own and then post the tweet. These are technically not retweets and the process of removing them is the same as it would be for a regular tweet, so what follows is an explanation of how to delete tweets from your Twitter profile. The way you find your profile depends on whether you're using Twitter on your computer or on your phone: On the mobile app, do this by tapping the avatar at the bottom-right corner of your screen that says "Me". On a web browser, click on the picture of your avatar at the top-right corner of your screen. Click on the name of your Twitter handle as it appears in the drop down menu. Scroll through your profile to see the full history of your tweets, until you come across the tweet you would like to delete. If you remember what the tweet said, you can type keywords from the tweet into the search bar at the top-right corner of your screen to search for a specific tweet (although this method will give you results from other users, too). A list of options will appear. The tweet will be removed from your profile!
++++++++++
One-sentence summary -- Know the difference between a retweet and a copied tweet. Go to your profile. Once on your profile, find the tweet you want to delete. Click on the three grey dots on the bottom-right corner of the tweet you would like to delete. Click on "Delete Tweet".

The Outlook URL is www.outlook.com. You will need to login the next time you use Outlook on the web.
++++++++++
One-sentence summary -- Open Outlook in a web browser. In the top right corner, click your name or username. Click Sign out.

If your image has people in it, their hairstyles and clothing styles can be an indicator of the time period. Take a look at clothing catalogs and photographs with known dates. These can help you narrow down a timeframe for your image. Remember that things like style can be regional, so look for images of people from similar regions or spheres of cultural influence. By the time photography was invented, women's dress was typically more period-specific and evolved faster. If you have a woman in your image, look at her dress and style first, as this may offer a more narrow time frame. Sources like national archives for different nations, the Library of Congress photo collections, and digitized museum archives may be good places to start looking for comparable images. Like dress, props can be a good indicator of the time period. If your image shows an early phone, for example, your image would have to date to after 1878, when the first phone companies were founded and telephones became publicly accessible. Items like bicycles, toys, and cookware can also be great indicators of the time period for an old image. Check online or look through old department store catalogs to help you place specific types and models. This one is a bit trickier than fashion and dress, but certain types of animals or plants can be an indicator of the time period. The Cordoba Fighting Dog, for example, was bred out in favor of the Dogo Argentino by the 1920s. A photo with a dog of that breed, then, would have to come before the 20's. Exotic plants, likewise, can be an indicator of the time period. If you see a plant like a palm tree that seems conspicuously out of place for the presumed time period, search online to see when that plant species was first imported into the area.
++++++++++
One-sentence summary --
Look at dress and hairstyles in the images. Look for props in the image. Check on different species of plants and animals.