- published: 04 Aug 2010
- views: 84325
Portable Document Format (PDF) is a file format used to represent documents in a manner independent of application software, hardware, and operating systems. Each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, graphics, and other information needed to display it. In 1991, Adobe Systems co-founder John Warnock outlined a system called "Camelot" that evolved into PDF.
While the PDF specification has been available free of charge since at least 2001, PDF was originally a proprietary format controlled by Adobe. It was officially released as an open standard on July 1, 2008, and published by the International Organization for Standardization as ISO 32000-1:2008. In 2008, Adobe published a Public Patent License to ISO 32000-1 granting royalty-free rights for all patents owned by Adobe that are necessary to make, use, sell and distribute PDF compliant implementations.
PDF's adoption in the early days of the format's history was slow.Adobe Acrobat, Adobe's suite for reading and creating PDF files, was not freely available; early versions of PDF had no support for external hyperlinks, reducing its usefulness on the Internet; the larger size of a PDF document compared to plain text required longer download times over the slower modems common at the time; and rendering PDF files was slow on the less powerful machines of the day. Additionally, there were competing formats such as DjVu (still developing), Envoy, Common Ground Digital Paper, Farallon Replica and even Adobe's own PostScript format (.ps); in those early years, PDF was popular mainly in desktop publishing workflows.
O mundo é um grande pão com manteiga
café com leite
Nunca mais,
nunca mesmo sobre qualquer assunto
Obtemperarei...assim espero
Porque sei calcular o valor
de um amor que desponta
Eu meço pelo tamanho da dor
Que no final eu sei que vai sobrar
É preciso dizer, é preciso dizer
Ié, ié, ié, ié, ié, ié, ié
Tá na hora, tá na hora
Todo mundo foi embora e eu sobrei
Aqui feito um bobo só pensando nela
Já soprei a vela e vou deitar
Até as pernas melhorar
vou voltar a caminhar
E se Deus quiser Ele vai me chamar
Eu também quero e eu vou, eu vou
Eu também quero e eu vou, eu vou
E você como vai? Tudo bem
Intão vem. Como não? Eu também
Tudo bão? Tá não
Cê também? Intão vão
Vomitão!