In computers, tape is an external storage medium, usually both readable and writable, consisting of a loop of flexible celluloid-like material that can store data in the form of tiny magnetic fields that can be read and also erased.

A popular way to back up files on a personal computer. As the term implies, an MO device employs both magnetic and optical technologies to obtain ultra-high data density. 

Commonly used alternative term for "email", which is a message distributed in electronic form from one computer user to one or more recipients via a network.

A mail server (also known as a mail transfer agent or MTA, a mail transport agent, a mail router or an Internet mailer) is an application that receives incoming e-mail from local users and remote senders and forwards outgoing e-mail for delivery.

A program that allows you to receive and send e-mail messages; it's usually just called an e-mail program. 

MailChimp is an email marketing service provider that sends out e-mails on behalf of their customers. The MailChimp service is accessible both via its website and a smartphone app.

A high-performance computer used for large-scale computing purposes that require greater availability and security than a smaller-scale machine can offer. 

Mainframe Testing is similar to client-server applications testing, but one needs to know how to operate basic TSO and ISPF commands and menus, view mainframe files, look at and use SDSF or other output tool, log on CICS and transactions, use FTP or another transfer protocol, submit the batch job - it's for QA testing of mainframe applications. And plus, unlike the QA testing for another platform, like WEB and/or client-service, the mainframe is usually back-end, it requires the needs and understanding of COBOL, DB2, JCL, CICS, Assembler, VSAM, ISPF/TPF.

To keeping IT systems (hardware or software) in a state of good working order.

The practice of keeping IT systems (hardware or software) in a state of good working order.

Maintenance Engineer is a person who ensures the optimization of software, procedures and budgets to achieve better maintainability, reliability, and availability of the software.

A makefile is used with the UNIX make utility to determine which portions of a program to compile. A makefile is basically a script that guides the make utility to choose the appropriate program files that are to be compiled and linked together.

ITIL Managing Across the Lifecycle (MALC) by AXELOS

A software used or created by attackers to disrupt computer operation, gather sensitive information, or gain access to private computer systems. It can appear in the form of code, scripts, active content, and other software, and includes viruses etc.

Malware Analysis is the study of a malware by dissecting its different components and studying its behavior on the host computer's operating system. Static analysis gives an approximate picture at best. It is impossible to fully predict the behavior of all but the smallest programs. Static analysis has the advantage that it can reveal how a program would behave under unusual conditions, because we can examine parts of a program that normally do not execute. With dynamic analysis, we study a program as it executes. Here, tools of the trade are debuggers, function call tracers, machine emulators, logic analyzers, and network sniffers. The advantage of dynamic analysis is that it can be fast and accurate. However, dynamic analysis has the disadvantage that "what you see is all you get". For the same reason that it is not possible to predict the behavior of a non-trivial program, it is also not possible to make a non-trivial program traverse all paths through its code.

Mobile application management (MAM) describes software and services responsible for provisioning and controlling access to internally developed and commercially available mobile apps used in business settings on both company-provided and “bring your own” smartphones and tablet computers.