In one sentence, describe what the following article is about: Zombies will be swarming your fortress almost constantly, so you'll need strong walls to repel them. Stone makes for the strongest walls, though it is the most time-consuming process. The thicker the walls are, the better. Remember that Zombies can break stone blocks if they attack it continuously. Also, there are zombies that can climb up walls if not protected; you need to set up traps around your base. This will create ramparts, allowing you to more easily defend the wall from attacking zombies. It will take some extra materials, but your fort will be much more secure. Use dynamite to blast a large chasm around your fort. Attacking zombies will fall down the hole, killing them if it's deep enough. Make sure that the chasm goes all the way around your fort. You can build a bridge with a ladder hanging down to allow you access to the fort. Zombies aren't able to climb ladders. For best effect, make the sides of the chasm as smooth as possible. This will ensure that the zombies can't break their fall on protruding blocks. Your fort needs to be well supplied to survive for long days. To store your rations, you need to build a small chest or simply make use of the house's drawers and cupboards. To build a storage chest, you need 6 Plywood. Plywood can be built from Wood Planks, not from burnt or old trees. Press I; click the Storage Chest in the craft list to activate the pattern. Following the pattern, place 1 plywood per box to finish the process. Building a farm is a good source of water; you can make an infinite water hole by breaking one block off the ground and pouring water into it. The supply will be infinite as long as you use a glass jar for drinking.
Summary: Build tall walls. Build a walkway onto the top of the wall. Dig a deep ditch around your wall. Get Supplies.

In one sentence, describe what the following article is about: Go to https://smallpdf.com/protect-pdf/ in your web browser. This website will allow you to add to your PDF a password that must be entered before the PDF can be opened. It's a link in the middle of the page. Doing so will prompt your computer's File Explorer (Windows) or Finder (Mac) window to open. Go to the location of the PDF that you want to password-protect, then click the PDF. It's in the bottom-right corner of the window. This will upload the PDF to the SmallPDF website. Type the password that you want to use into the "Choose your password" text field, then re-enter the password in the "Repeat your password" text field below it. Your passwords must match each other in order for you to be able to continue. It's a red button below the password text fields. The password will be applied to your PDF. You'll see this button on the left side of the page. Clicking it prompts the PDF file to download into your computer's default downloads folder, though you may first have to select a save location and click Save depending on your browser.
Summary:
Open SmallPDF's protection page. Click Choose file. Select a PDF. Click Open. Enter a password. Click ENCRYPT PDF . Click Download File Now.