First, when you go to open a file, you can the File Of Type option and you can choose other kinds of files that Excel can open. If you set it to All Files, you will be able to choose from a wider range of files, but Excel may not be able to open them.
All files can be deleted. To be sure you don't lose a file, keep backups of it, so that you have a copy if a file gets deleted.
The difference between native and non-native species is that native species are from that area and non-native species are not from that area.
The Hawaiian word for a non-native is "malihini." It refers to someone who is a newcomer or visitor to the islands, not originally from Hawaii.
In Visual C++, or C# you can use static method Directory or non-static DirectoryInfo.
There is a program known as "calibre" that should be capable of opening and reading non-DRM.lit files. There is also a command-line utility in most repositories known as "convlit" that can convert them to HTML files.
There is no difference between an LT drawing and a "full version" drawing. The file format is the same, so you can open an LT drawing in a non LT AutoCAD.
a non native species is a species that isn't within a certain ecosystem.
a non native species is a species that isn't within a certain ecosystem.
Executable means that the file has a series of instructions used to execute a program. Non-executable files are ones that do not have these instructions.
Whales. (And I believe you mean "What is a non-native species to the ocean?")
The cause of non-opening might be file corruption. If it's right you would advise application below. It can help you to open .pdf documents of any version Adobe Acrobat
About 44% of the land in Alaska is owned by Native American tribes and corporations as a result of settlement claims and other agreements.