.ctt - Windows Live Messenger Contact List
.dat - Generally text or binary datafile
.3dr - 3DMark result
.pst - Microsoft Office Outlook Personal folder file
.xml - XML document
.mpp - Microsoft Project file
.metadata_never_index - iPod file (Mac specific file)
.sys - Data file
file extension TDR - Medlin Accounting tax deposit records
File extension TDR description:
Tax records used by Payroll software.Associated applications to file extension TDR:
Company / developer:
Medlin Accounting
Payroll Software
Payroll Software can prepare payroll for a single employer as well as for multiple employers - stores up to 5000 employees per employer.
Medlin Payroll Software is installed and run on your computer. It is compatible with Windows Vista, XP, 2000, ME, NT, 98, and 95.
Medlin Payroll Software can print on many blank check paper styles, including most types of paycheck stock you have purchased for other software.
It automatically keeps backups in a separate folder on your computer.