It has been revised, but if you can avoid printing it out again it will save you money and be better for the environment.
Saving paper, though for far different reasons, takes me back to the early 60's and applying for a job after leaving the RAF. It was clerical work in a Timber Importer's office requiring 'good mathematical skills'. I believe I had same so applied and eventually got the job; then I found out about mathematical skills. Timber was imported then (and in part today although now converted into metric equivalents) calculated by the use of such antiquated measurements as the Petrograd Standard, Foot Board Measure, Square Measure, and Cubic Feet. All totally new to me and the point I wish to make it this was
long before calculators were invented. Calculations had to be first done on scrap paper using good old mental arithmetic, then checked by someone else, and woe betide if you made a mistake, or more to the point, continued to do so.
The office had 'Dickensian' sloping desks, although as a relative junior I did not qualify to use these, so sat at a table on a bench seat. Every day the senior partner in the firm passed around old envelopes that had been opened out and stapled together. You were required to use pencils and use up all available space per page, before progressing on to another page. Asking for more scrap paper (ie envelopes) was a bit like Oliver Twist asking for more gruel. In total fairness I admit I was helped by one of the 'oldies' sitting at one of the sloping desks, who would pass on some pages if I ran out. The other oldie - a spinster lady - used to check my work, and seemed to take pleasure in pointing out I was out by as little as 0.002 of whatever calculation I was doing.
So to return to my point about paper saving, in those days it was a matter -as they saw it - of thrift, not to save the planet. But the happy ending was I took to the calculations and had pleasure in eventually checking those done by the spinster lady. But tell the kids of today about using scrap paper and pencils to do calculations without the use of a calculator or mobile phone, they wouldn't believe it.