Next time you need to email a folder of source code or documents, try using WinRAR to compress it as .7z on the "Ultra" setting. You will likely get a file smaller than both .zip and .rar —without ever leaving your favorite archiving tool. WinRAR and 7-Zip are trademarks of their respective owners. This article is for informational purposes only.
When people think of file compression, two names dominate the conversation: WinRAR and the .7z format. At first glance, they might seem like rivals. WinRAR is famous for its proprietary .rar format, while .7z is the native format of the open-source champion, 7-Zip. winrar archive -.7z-
However, one of the most powerful—and often overlooked—features of WinRAR is its full support for creating, modifying, and extracting .7z archives. This article dives into the relationship between WinRAR and the .7z format, exploring why you might choose one over the other and how to use WinRAR to master .7z files. The .7z file extension is the default archive format for 7-Zip , an open-source file archiver first released in 1999. Unlike older formats like .zip , .7z was built from the ground up for maximum compression. Next time you need to email a folder
Here is exactly what you can do with .7z files in WinRAR: WinRAR handles .7z extraction out-of-the-box. Double-click a .7z file, and WinRAR will open it like any other archive. You can extract individual files or the entire contents with full preservation of folder structures. 2. Creating .7z Archives This is where many users are surprised. WinRAR can create .7z files, not just open them. This article is for informational purposes only
If you already own or use WinRAR (in its perpetual trial mode or licensed version), you do not need to install 7-Zip just to create high-efficiency .7z archives. WinRAR has you covered.
| Feature | .7z (via WinRAR) | .RAR (native) | | :--- | :--- | :--- | | | Slightly better for text and code | Better for multimedia (audio, video, raw images) | | Speed | Slower to compress (LZMA is CPU-intensive) | Faster to compress and extract | | Recovery Record | ❌ Not supported | ✅ WinRAR-exclusive feature to repair damaged archives | | Encryption | AES-256 (standard) | AES-256 (also standard) | | Solid Mode | ✅ Supported | ✅ Supported | | Compatibility | Open format, widely supported | Proprietary; requires WinRAR or open-source tools like PeaZip |
This LMC simulator is based on the Little Man Computer (LMC) model of a computer, created by Dr. Stuart Madnick in 1965. LMC is generally used for educational purposes as it models a simple Von Neumann architecture computer which has all of the basic features of a modern computer. It is programmed using assembly code. You can find out more about this model on this wikipedia page.
You can read more about this LMC simulator on 101Computing.net.
Note that in the following table “xx” refers to a memory address (aka mailbox) in the RAM. The online LMC simulator has 100 different mailboxes in the RAM ranging from 00 to 99.
| Mnemonic | Name | Description | Op Code |
| INP | INPUT | Retrieve user input and stores it in the accumulator. | 901 |
| OUT | OUTPUT | Output the value stored in the accumulator. | 902 |
| LDA | LOAD | Load the Accumulator with the contents of the memory address given. | 5xx |
| STA | STORE | Store the value in the Accumulator in the memory address given. | 3xx |
| ADD | ADD | Add the contents of the memory address to the Accumulator | 1xx |
| SUB | SUBTRACT | Subtract the contents of the memory address from the Accumulator | 2xx |
| BRP | BRANCH IF POSITIVE | Branch/Jump to the address given if the Accumulator is zero or positive. | 8xx |
| BRZ | BRANCH IF ZERO | Branch/Jump to the address given if the Accumulator is zero. | 7xx |
| BRA | BRANCH ALWAYS | Branch/Jump to the address given. | 6xx |
| HLT | HALT | Stop the code | 000 |
| DAT | DATA LOCATION | Used to associate a label to a free memory address. An optional value can also be used to be stored at the memory address. |