What are the different types of Card Machines that can be used to accept credit cards?

Countertop card machine
The countertop card machine meets the highest security requirements and is PCI PTS 3.x certified with SRED and open protocol modules. The optional PIN privacy shield provides additional PIN entry confidentiality. Businesses can rest in the knowledge that the iCT 250 card machine accepts all electronic payment methods. The countertop card machine is robust and designed for busy settings such as retail or hospitality settings.
Mobile card machine
The iWL251 credit card terminal is perfect for businesses who are starting to accept credit cards with its mobile connectivity. With a built-in SIM card, the mobile card machine is perfect for companies with no fixed address or those who operate an on the go focus. The Ingenico iWL 251 meets the highest security requirements and is PCI-PTS x and 3.x certified with SRED & open protocol modules.
Wi-Fi card machine
Portable card machine
Accept Credit Cards FAQ
What are the basics of credit card payments?
What is the application process to accepting cards?
If you want to start accepting credit cards will you need to know how the technology works?
Are there benefits to your business if you start accepting credit cards?
Does accepting credit cards lead to an opportunity for increased sales?
Does accepting credit cards save your business time?
If I start accepting credit cards will it increase my business’s credibility?
Has accepting credit cards become a pivotal aspect to the success of online businesses?
How can my business start accepting credit cards?
How can my business start accepting credit cards?
If I want to start accepting credit cards how can I be sure if my business would be deemed high risk?
Which acquirers can help me to start accepting credit cards?
Barclays
Elavon
Worldpay who are part of Natwest
Clydesdale Bank
Global Payments who are part of HSBC
Lloyds Cardnet
Royal Bank of Scotland who operate through WorldPay
The Cooperative Bank
Yorkshire Bank
First Data Merchant Solutions
Evo payments
Valitor
Now I’m able to accept credit cards what hardware do I need?
How does a card machine rental work?
How can I get a merchant account?
Ensure your business and directors associated with the business have a positive credit rating
Be honest on all paperwork relating to the merchant application
Find a company that delivers a merchant account best tailored to the needs of your business
Do you need a merchant account for card payments?
How does a merchant account work?
How do I get setup to accept card payments?
Are there joining fees to start accepting credit cards?
What is a merchant account?
The above information is merely a guide and not to be taken on face value. We’ve tried to ensure the information stated is accurate and have relinquished any preferential treatment to any third parties, suppliers or banks. As stated in the title it is a guide, nothing more, nothing less and we always recommend companies who are considering accepting credit cards to speak with providers and to undertake their own diligent research before making a decision which is right for them.
** source – https://www.theukcardsassociation.org.uk/wm_documents/UK%20Card%20Payments%202017%20-%20Summary%20FINAL.pdf