Mac OS X is the latest version of the operating system software for Apple's Macintosh computers. It was first released in 2001. The two main parts are Darwin, which is an open-source, BSD-based environment similar to Unix, and Aqua, an Apple-developed proprietary graphical user interface.
The naming scheme for this release involves using the letter X as a Roman numeral, pronounced "ten." Some people read it as "ex," but this isn't officially recognized by Apple. It is named after a large feline animal, like a lion or tiger, and represents the next major update from Apple.
This system runs on the same architecture as its workstation versions, but with differences in management tools that allow for simplified access to key network services such as e-mail servers, Samba, LDAP directory servers, and DNS name servers. This also includes different licensing models.
As for your question about the difference between MAC and iOS, they refer to completely different things. MAC stands for Mac, referring to Apple's line of personal computers, while iOS refers to Apple's mobile operating system for smartphones and tablets.
BootCamp is a utility program that allows users to install Windows 7 on their MacBook, iMac, or other Intel-based Mac computer. This software guides you through the process of creating a bootable CD-ROM drive that contains all the necessary hardware drivers for the machine. After installation, the computer can be rebooted into either the macOS or Windows 7 operating systems, depending on the user's preference.