Public domain for 3 reasons, as a work first published in the United States:
The book cover, by itself, contains only simple text and simple geometric shapes, below the threshold of originality for copyright protection in the United States.
In any case, http://comminfo.rutgers.edu/~lesk/copyrenew.html shows no record of renewal; earliest Fortran book renewed appears to be Programmer's manual, Fortran II by T.E. Bradshaw (registration A343960 on 1958-05-12, renewal RE-279-786 on 1986-01-06). U.S. works before 1964 must be renewed within 28 years; a 1956 publication without renewal would have entered the public domain by 1984 at the latest.
اجازهنامه
Public domainPublic domainfalsefalse
این تصویر فقط شامل شکلهای سادهٔ هندسی و/یا متن است. و آن آستانهٔ اصالت مورد نیاز برای محافظت حق تکثیر را برآورده نمیکند، و بنابراین در مالکیت عمومی قرار دارد. اگر چه این تصویر از محدودیتهای حق تکثیر آزاد است، ممکن است هنوز مشمول سایر محدودیتها شود. برای کسب اطلاعات بیشتر WP:PD § Fonts یا بحث الگوی PD-textlogo را ببینید.
This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
این پرونده حاوی اطلاعات اضافهایاست که احتمالاً دوربین دیجیتال یا پویشگری که در ایجاد یا دیجیتالیکردن آن به کار رفته آن را افزوده است. اگر پرونده از وضعیت ابتداییاش تغییر داده شده باشد آنگاه ممکن است شرح و تفصیلات موجود اطلاعات تصویر را تماماً بازتاب ندهد.