cloud computing glossary

Glossary for Cloud Industry


Alibaba Cloud (Chinese: 阿里云; pinyin: Ālǐyún), also known as AliCloud or Aliyun, is a Chinese cloud computing company, a subsidiary of Alibaba Group. Alibaba Cloud provides cloud computing services to online businesses and Alibaba’s own e-commerce ecosystem.

As in Aug. 2019, the company made an announcement to rename Alibaba Cloud to Alibaba Cloud Intelligence.

Alibaba Cloud offers cloud services. Services are available on a pay-as-you-go basis and include Elastic Compute, Data Storage, Relational Databases, Big-Data Processing, Anti-DDoS protection and Content Delivery Networks (CDN).

Amazon Web Services (AWS) – Amazon Web Services is a suite of cloud computing services that make a comprehensive cloud platform offered by AWS offers over three dozen cloud services spanning the IaaS, PaaS, and SaaS models of cloud computing, and is the most popular cloud service provider, with nearly 30% global market share in cloud IaaS, as of 2015. Well-known AWS services include Amazon EC2, Amazon Elastic Beanstalk, and Amazon S3.

App – an application, especially as downloaded by a user to a mobile device. Or A mobile application, also referred to as a mobile app, is a computer program or software application designed to run on a mobile device such as a phone, tablet, or watch.

Application – An application is a group of computer programs designed to allow a user to perform a set of functions or tasks.

Application Programming Interface (API) – An application programming interface (API) is an interface that allows the user to access information from another service and integrate this service into their own application. Through a set of defined requests, the asking application is allowed to access limited pieces of the called upon application’s functionality. APIs are used to share limited functionality between programs.

AzureMicrosoft Azure (formerly Windows Azure) is a cloud computing service created by Microsoft for building, testing, deploying, and managing applications and services through Microsoft-managed data centers. It provides software as a service (SaaS), platform as a service (PaaS) and infrastructure as a service (IaaS) and supports many different programming languages, tools, and frameworks, including both Microsoft-specific and third-party software and systems.


Backup – A copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event. The verb form, referring to the process of doing so, is “back up”, whereas the noun and adjective form is “backup”. Backups can be used to recover data after its loss from data deletion or corruption, or to recover data from an earlier time.

Backup-as-a-Service (BaaS) – An approach to backing up data that involves purchasing backup and recovery services from an online data backup provider. Instead of performing backup with a centralized, on-premises IT department, BaaS connects systems to a private, public or hybrid cloud managed by the outside provider. Backup as a service is easier to manage than other offsite services. Instead of worrying about rotating and managing tapes or hard disks at an offsite location, data storage administrators can offload maintenance and management to the provider.

Backup Policy – Set of pre-configured settings for backup task to defined intervals by time and sets of backup copy or retentions with regularly tested to ensure the backup availability and recovery.

Beta version – A version of a piece of software that is made available for testing, typically by a limited number of users outside the company that is developing it, before its general release.

Big Data – A broad term used to describe unconventional data sets which are either too large or too complex to be dealt with using traditional data-processing techniques where the information may be analysed computationally to reveal patterns, trends, and associations, especially relating to human behaviour and interactions in order to help create a more computational decision and choices.


CAPEX (Capital Expenditure) – CAPEX is defined as business expenses incurred in order to create long-term benefits in the future, such as purchasing fixed assets like a building/property or equipment such as servers, firewall, storage or data center.

Cloud Application – An application that runs in the cloud.

Cloud Backup – Cloud backup is the process of backing up data to a remote, cloud-based storage server in a secured data center.

Cloud Computes – An-demand availability of computer system resources, especially data storage and computing power such as virtual processor (vCore) and virtual memory, without direct active management and CAPEX investment by the user.

Cloud Computing (Cloud) – Cloud computing or Cloud itself is the delivery of information technology services over a network, usually the internet. In the cloud computing model, infrastructure, data, and software are hosted by the service provider and delivered to the user as a service, much like a utility company would deliver water or electricity.

According to the official NIST definition, there are five essential characteristics of cloud computing: on-demand self-service provisioning of resources, broad network access, resource pooling, rapid elasticity, and measured service with pay as you use charging model.

The three main cloud computing models are infrastructure as a service, software as a service, and platform as a service.

Cloud Management Platform (CMP) – A cloud management platform (CMP) is a management dashboard of cloud product that gives the user integrated management of public, private, and hybrid cloud environments. Example of CMP is vCloud Director from VMware.

Cloud Marketplace – A cloud marketplace is an online marketplace, operated by a cloud service provider (CSP), where customers can browse and subscribe to software applications and developer services that are built on, integrate with, or supplement the CSP’s main offering. Amazon’s AWS Marketplace and Microsoft’s Azure store are examples of cloud marketplaces.

Cloud Migration – Cloud migration is the process of transferring all of or a piece of a company’s data, applications, and services from on-premise to the cloud.

Cloud Native – Applications developed specifically for cloud platforms.

Cloud Service Provider (CSP) – A Cloud Service Provider (CSP) is a company that offers a cloud computing service, such as PaaS, IaaS, or SaaS, to individuals or other businesses.

Cloud Sourcing – Cloudsourcing is the act of replacing traditional on-premise IT operations with low-cost cloud-based services.

Cloud Storage – Cloud storage is a model of computer storage in which data is stored in facilities (often multiple facilities) managed by a hosting company (cloud service provider) and is accessed remotely by the user via a network.

Container – A container a virtualization instance in which the kernel of an operating system allows for multiple isolated user-space instances. Unlike virtual machines (VMs), containers do not need to run a full-blown operating system (OS) image for each instance. Instead, containers are able to run separate instances of an application within a single shared OS.

Content Delivery Network (CDN) – A content delivery network (CDN) is a network of distributed services that deliver content to a user based on the user’s geographic proximity to servers. CDNs allow speedy content delivery for websites with high traffic volume or large geographic reach.

Customer Relationship Management (CRM) – Customer Relationship Management (CRM) applications allow a business to manage relationships with current and future customers by providing the business with tools to manage sales, customer service, and technical support roles. SaaS CRM applications, such as and FreshSales, are very popular.


Data Migration – The process of moving data between two or more storage systems, data formats, warehouses or servers.

Database – A database is an organized collection of data.

DevOps – An amalgamation of “development” and “operations,” DevOps is the combination of tasks performed by an organization’s applications development and systems operations teams. The DevOps software development method emphasizes collaboration, communication and integration between developers and other IT personnel with the goal of streamlining software development and quality assurance.


Elasticity – In cloud computing, elasticity is a term used to reference the ability of a system to adapt to changing workload demand by provisioning and deprovisioning pooled resources so that provisioned resources match current demand as well as possible.

Enterprise Application – An enterprise application is an application (or software) that is intended for large scale use by a (large) business.

Enterprise Resource Planning (ERP) – Enterprise Resource Planning (ERP) software allows a business or organization to manage a suite of integrated applications which are used to collect, manage, and store data on a variety of business activities. ERP solutions are often offered as a service.

Extensibility- The ability of a cloud solution to add new runtime and framework support via community buildpacks.


Federated Database – A system in which multiple databases appear to function as a single entity. However, the databases typically involved in this kind of system exists independently of the others. Once the different databases are “combined”, one federated database is formed.


Google Cloud Platform (GCP) – Google Cloud Platform (GCP) is a comprehensive cloud platform offered by Google, Inc. that consists of both infrastructure as a service (IaaS) and platform as a service (PaaS) offerings.

Guest Machine – See virtual machine


Host Machine – A host machine is a piece of physical hardware that hosts virtual machines.

Hybrid Cloud – A hybrid cloud is a cloud computing environment that is comprised of a mix of private cloud, public cloud, and on-premises solutions. In a hybrid cloud, private and public cloud infrastructures remain distinct from one another but are bound together by technology that allows data and services portability between them.

Hypervisor – A hypervisor or virtual machine monitor (VMM) is a piece of software that allows physical devices to share their resources among virtual machines (VMs) running on top of that physical hardware. The hypervisor creates, runs and manages VMs.


Infrastructure – Information technology (IT) infrastructure is a combined set of hardware and virtual resources that support an overall IT environment.

Infrastructure as a Service (IaaS) – Infrastructure as a Service (IaaS) is a model of cloud computing in which the vendor hosts virtualized computing resources, as well as network and storage resources, and provides them to the user as a service via the internet.

Integrated Development Environment (IDE) – An integrated development environment (IDE) is an application that provides a programming environment for developers. An IDE typically includes a code editor, automation tools, and a debugger.




Linux – Linux is an open-source operating system, built on Unix that is used for the majority of cloud services.

Load Balancing – The process of distributing computing workloads across multiple resources, such as servers. In cloud computing, a load balancer acts as a reverse proxy and distributes application traffic to multiple servers in order to prevent any single application server from becoming a point of failure.


Managed Service Provider (MSP) – A managed services provider (MSP) is an IT services provider that provides fully outsourced network, application, and system services across a network to clients.

Microservices – Microservices or microservice architecture is a way of designing applications in which complex applications are built out of a suite of small, independently deployable services. These ‘microservices’ run their own processes and communicate with one another using lightweight mechanisms such as language-agnostic APIs. Microservices are independently deployable and scalable, and can even be written in different languages.

Microsoft Azure – Microsoft Azure, formerly known as Windows Azure, is Microsoft’s cloud computing platform. Azure was originally launched as a PaaS solution but now provides both PaaS and IaaS services.

Middleware – Middleware is software that connects software components or enterprise applications.

Multi-Cloud – A multi-cloud strategy is the concurrent use of separate cloud service providers for different infrastructure, platform, or software needs. A multi-cloud approach can help prevent vendor lock-in, and may help an enterprise deal with diverse workloads and partners. However, a multi-cloud approach can complicate many processes, such as security and governance, and a Cloud management platform is recommended for this approach.

Multi-Tenancy – Multi-Tenancy is a mode of operation for software in which multiple instances of one or many applications run in a shared environment. In a cloud computing model, pooled physical and virtual resources are dynamically assigned and reassigned to tenants according to consumer demand.



On-Demand Self Service – A cloud computing service model by which a customer can provision additional cloud resources on-demand, without involving the service provider. Resources are typically provisioned through an online control panel.

On-Premise – On Premise technology is software or infrastructure that is run on computers on the premises (in the building) of the person or organization using the software or infrastructure. Microsoft Office Suite is an example of on-premise software because it needs to be installed on the computer that runs it, while  Microsoft 365 is not, because it is accessed via the internet and run remotely.

Open Source – Open Source is a development model in which a product’s source code is made openly available to the public. Open source products promote collaborative community development and rapid prototyping. OpenStack and CloudFoundry are examples of an open-source cloud computing platform.

Open Stack – OpenStack is a free, open-source cloud platform that is primarily deployed as an infrastructure as a service offering.


Personal Cloud – An example of cloud washing, Personal Cloud is a marketing term often used to describe network-attached storage (NAS) devices. A NAS device is a computer connected to a network that provides data storage services to other devices on the network.

Platform – In computing, a platform is defined as a computer system that applications run on, or as a base of technologies on which other technologies (such as applications) are built.

Platform as a Service (PaaS) – Platform as a Service (PaaS) is a model of cloud computing in which a vendor provides the hardware and software tools necessary to create, deploy and manage applications at scale to the user via the internet, as a service. For a more in-depth explanation, check out our article What the Heck is PaaS Anyway?

Private Cloud – A private cloud is a cloud infrastructure that is provisioned for use by a single organization comprised of multiple users. A private cloud cab managed and operated by the organization, a third party, or some combination of them, and it can exist on or off-premises.

Public Cloud – A public cloud is a cloud infrastructure that is hosted by a cloud services provider and is made available to the public via the internet.



Resource – In computer science, a resource is any component within a computer system that is of limited availability.


Scalability – Scalability is the ability of a process, system, or framework to handle a growing workload. In other words, a scalable system is adaptable to increasing demands. The ability to scale on demand is one of the biggest advantages of cloud computing.

Service Level Agreement (SLA) – A service level agreement (SLA) is a contractual agreement between a customer and a cloud service provider (CSP) which defines the level of service, availability and performance guaranteed by the CSP.

Shared Resources – Shared Resources, also known as network resources, are computing resources that can be accessed remotely through a network, such as a Local Area Network (LAN) or the internet.

Software as a Service (SaaS) – Software as a service (SaaS), is a model of cloud computing in which applications (software) are hosted by a vendor and provided to the user as a service. SaaS applications are licensed on a subscription basis and are made available to users over a network, typically the internet.

Because SaaS applications can be accessed at any time, at any place, and on any platform, they have become a popular model for delivery of many business applications. A well-known example of SaaS is Microsoft’s Office 365, which provides Microsoft’s famous suite of productivity software— including MS Word and Excel— as a service.

Software Development Kit (SDK) – A Software development kit (SDK), also known as a developer’s toolkit or devkit, is a set of development tools that aids or allows the creation of applications for a certain platform. SDKs typically include APIs, sample code, documentation, debuggers and other utilities.

Software Stack – A software stack is a group of applications that work in a specific and defined order to achieve a common goal.



User Interface (UI) – User interface (UI) is the way that the user and computer system interact.

User Experience (UX) –The nature of a user’s interaction with and perception of a system.

User Space – The memory area of an operating system where application software executes.


Vendor Lock-in – Vendor lock-in is when a customer finds themselves “locked-in” or stuck with a certain cloud service provider (CSP). Vendor lock-in is characterized by extreme difficulty in moving from one cloud vendor to another, usually due to a lack of standardized protocols, APIs, data structures, and service models.

Vertical Cloud – A vertical cloud is a cloud computing solution that is built or optimized for a specific business vertical such as manufacturing, financial services, or healthcare.

Virtual Desktop Infrastructure (VDI) – Virtual desktop infrastructure (VDI) is a desktop operating system hosted within a virtual machine.

Virtual Machine (VM) – A virtual machine is a software computer that runs an operating system or application environment, just as physical hardware would. The end-user has the same experience on a VM as they would on dedicated hardware.

Essentially, a VM is a machine within a machine. By running VMs, a hardware computer can run multiple instances of the same operating system. Applications running on separate instances cannot interfere with each other, so if one app crashes, it will not affect apps on other VMs.

Virtual Machine Monitor (VMM) – See hypervisor.