You're a fan of the old Dos Commander Keen series ?
Some models may be available in some areas but not others.
Sony Global - Support
Electronics - choose the country the computer is sold in
VAIO and Computing
Search by Model Number
Select Category - VPCF1
Select Model -
If there is no VPCF13UFX model without /letter at the end of it, it doesn't exist - the VPCF13UFX model you looked at has a /letter
Note that I found older Sony models have two model numbers
- one on a label on the outside of the laptop,
- the other one is shown in the laptop's bios Setup.
The latter one is the one you use to look up specific specs and support info.
That may still apply