Here are a few images from Prestel that do not have any particular category.
92b
BILL INFORMATION GUIDE DRYDEN COMPUTER A The Bill frame shows your charge details for this Prestel computer only.Further charges may have been incurred on another computer.
B The "Current Call" charges cover the period from the start of this call until the display of p.92 commences. The time charge is for computer access time only and does not include telephone call charges.
C Telephone call charges incurred are not shown on Prestel but will be included as part of your normal telephone bill.