An A record is used by DNS to send users to a location on the internet
CP
Either the Top Level, Admin or Users Control Panel
DNS
DNS is used to direct users requests to a website or for email to the correct place by pointing the domain name at an IP address
MX record
An MX record is a DNS record used by email for a domain.
plan
A plan is set of resources available for a user to sign up to, within a plan you can set limits and costs for all resources that you offer.
POP3
This is the protocol used to receive email, you will need to specify a POP3 server within your email client to receive mail, this will normally be mail.yourdomain.ext but you can check this within the users CP under Mail Info/Mail Manager
SMTP
This is the protocol used to send out email, you will need to specify an SMTP server within your email client to send out mail, this will normally be mail.yourdomain.ext but you can check this within the users CP under Mail Info/Mail Manager
static IP
A permanent Internet Address assigned by your Network provider
URL
The path put into an Internet Browser to access a website