Typewriter in the context of Olivetti Lettera 22

The Perkins Brailler is a "braille typewriter" with a key corresponding to each of the six dots of the braille code, a space key, a backspace key, and a line space key. Like a manual typewriter, it has two side knobs to advance paper through the machine and a carriage return lever above the keys. The rollers that hold and advance the paper have grooves designed to avoid crushing the raised dots the brailler creates.

Although braille notation was designed for people who are blind or visually impaired to read, prior to the introduction of the Perkins Brailler, writing braille was a cumbersome process. Braille writers created braille characters with a stylus and slate (as developed by Louis Braille) or by using one of the complex, expensive, and fragile braille writing machines available at the time.

Marcello Nizzoli (Italian pronunciation: [marˈtʃɛllo nitˈtsɔli]; 1887 – 1969) was an Italian artist, architect, industrial and graphic designer. He was the chief designer for Olivetti for many years and was responsible notably for the iconic Lettera 22 portable typewriters in 1950.

A computer keyboard is a built-in or peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Replacing early punched cards and paper tape technology, interaction via teleprinter-style keyboards have been the main input method for computers since the 1970s, supplemented by the computer mouse since the 1980s, and the touchscreen since the 2000s.

Keyboard keys (buttons) typically have a set of characters engraved or printed on them, and each press of a key typically corresponds to a single written symbol. However, producing some symbols may require pressing and holding several keys simultaneously or in sequence. While most keys produce characters (letters, numbers or symbols), other keys (such as the escape key) can prompt the computer to execute system commands. In a modern computer, the interpretation of key presses is generally left to the software: the information sent to the computer, the scan code, tells it only which physical key (or keys) was pressed or released.

Spencerian script is a handwriting script style based on Copperplate script that was used in the United States from approximately 1850 to 1925, and was considered the American de facto standard writing style for business correspondence prior to the widespread adoption of the typewriter. Spencerian script, a form of cursive handwriting, was also widely integrated into the school system as an instructional method until the "simpler" Palmer Method replaced it. President James A. Garfield called the Spencerian script "the pride of our country and the model of our schools."

Blackboard bold is a style of writing bold symbols on a blackboard by doubling certain strokes, commonly used in mathematical lectures, and the derived style of typeface used in printed mathematical texts. The style is most commonly used to represent the number sets ${\displaystyle \mathbb {N} }$ (natural numbers), ${\displaystyle \mathbb {Z} }$ (integers), ${\displaystyle \mathbb {Q} }$ (rational numbers), ${\displaystyle \mathbb {R} }$ (real numbers), and ${\displaystyle \mathbb {C} }$ (complex numbers).

To imitate a bold typeface on a typewriter, a character can be typed over itself (called double-striking); symbols thus produced are called double-struck, and this name is sometimes adopted for blackboard bold symbols, for instance in Unicode grapheme names.

The Adventures of Tom Sawyer (also simply known as Tom Sawyer) is a novel by Mark Twain published on June 9, 1876, about a boy, Tom Sawyer, growing up along the Mississippi River. It is set in the 1830s–1840s in the town of St. Petersburg, which is based on Hannibal, Missouri, where Twain lived as a boy. In the novel, Sawyer has several adventures, often with his friend Huckleberry Finn. Originally a commercial failure, the book ended up being the best-selling of Twain's works during his lifetime.

Along with its 1885 sequel, Adventures of Huckleberry Finn, the book is considered by many to be a masterpiece of American literature. It was alleged by Mark Twain to be one of the first novels to be written on a typewriter.

Wylie transliteration is a method for transliterating Tibetan script using only the letters available on a typical English-language typewriter. The system is named for the American scholar Turrell V. Wylie, who created the system and published it in a 1959 Harvard Journal of Asiatic Studies article. It has subsequently become a standard transliteration scheme in Tibetan studies, especially in the United States.

Any Tibetan language romanization scheme faces the dilemma of whether it should seek to accurately reproduce the sounds of spoken Tibetan or the spelling of written Tibetan. These differ widely, as Tibetan orthography became fixed in the 11th century, while pronunciation continued to evolve, comparable to the English orthography and French orthography, which reflect late medieval pronunciation.

Typing is the process of entering or inputting text by pressing keys on a typewriter, computer keyboard, mobile phone, or calculator. It can be distinguished from other means of text input, such as handwriting and speech recognition; text can be in the form of letters, numbers and other symbols. The world's first typist was Lillian Sholes from Wisconsin in the United States, the daughter of Christopher Latham Sholes, who invented the first practical typewriter.

User interface features such as spell checker and autocomplete serve to facilitate and speed up typing and to prevent or correct errors the typist may make.

JCUKEN (ЙЦУКЕН, also known as YCUKEN, YTsUKEN and JTSUKEN) is the main Cyrillic keyboard layout for the Russian language in computers and typewriters.

Earlier in Russia, the JIUKEN (ЙІУКЕН) layout was the main layout, but it was replaced by JCUKEN in 1953.

QWERTY (/ˈkwɜːrti/ KWUR-tee) is a keyboard layout for Latin-script alphabets; the name comes from the order of the first six keys on the top letter row of the keyboard: QWERTY. The design evolved for the quick typing of English on typewriters.

The QWERTY design is based on a layout included on the Sholes and Glidden typewriter sold by E. Remington and Sons from 1874. The layout became popular with the success of the Remington No. 2 of 1878 and remains in widespread use as a de facto standard on computers, as of 2025. Two prominent alternatives, Dvorak and Colemak, have been developed. In Europe, two types of modified layouts, QWERTZ and AZERTY, are used predominantly for German and French, respectively.

A torsion spring is a spring that works by twisting its end along its axis; that is, a flexible elastic object that stores mechanical energy when it is twisted. When it is twisted, it exerts a torque in the opposite direction, proportional to the amount (angle) it is twisted. There are various types:

• A torsion bar is a straight bar of metal or rubber that is subjected to twisting (shear stress) about its axis by torque applied at its ends.
• A more delicate form used in sensitive instruments, called a torsion fiber consists of a fiber of silk, glass, or quartz under tension, that is twisted about its axis.
• A helical torsion spring, is a metal rod or wire in the shape of a helix (coil) that is subjected to twisting about the axis of the coil by sideways forces (bending moments) applied to its ends, twisting the coil tighter.
• Clocks use a spiral wound torsion spring (a form of helical torsion spring where the coils are around each other instead of piled up) sometimes called a "clock spring" or colloquially called a mainspring. Those types of torsion springs are also used for attic stairs, clutches, typewriters and other devices that need near constant torque for large angles or even multiple revolutions.

Dot matrix printing, sometimes called impact matrix printing, is a computer printing process in which ink is applied to a surface using a relatively low-resolution dot matrix for layout. Dot matrix printers are a type of impact printer that prints using a fixed number of pins or wires and typically use a print head that moves back and forth or in an up-and-down motion on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper. They were also known as serial dot matrix printers. Unlike typewriters or line printers that use a similar print mechanism, a dot matrix printer can print arbitrary patterns and not just specific characters.

The perceived quality of dot matrix printers depends on the vertical and horizontal resolution and the ability of the printer to overlap adjacent dots. 9-pin and 24-pin are common; this specifies the number of pins in a specific vertically aligned space. With 24-pin printers, the horizontal movement can slightly overlap dots, producing visually superior output (near letter-quality or NLQ), usually at the cost of speed.

Duplicating machines were the predecessors of modern document-reproduction technology. They have now been replaced by digital duplicators, scanners, laser printers, and photocopiers, but for many years they were the primary means of reproducing documents for limited-run distribution. The duplicator was pioneered by Thomas Edison and David Gestetner, with Gestetner dominating the market up until the late 1990s.

Like the typewriter, these machines were products of the second phase of the Industrial Revolution which started near the end of the 19th century (also called the Second Industrial Revolution). This second phase brought to mass markets technologies like the small electric motors and the products of industrial chemistry without which the duplicating machines would not have been economical. By bringing greatly increased quantities of paperwork to daily life, the duplicating machine and the typewriter gradually changed the forms of the office desk and transformed the nature of office work.

Carbon paper (originally carbonic paper) consists of sheets of paper that create one or more copies simultaneously with the creation of an original document when inscribed by a typewriter or ballpoint pen. The email term cc, which stands for "carbon copy", is derived from this use of carbon paper.

A mimeograph machine (the term often being abbreviated to mimeo), sometimes called a stencil duplicator or stencil machine, is a low-cost duplicating machine that works by forcing ink through a stencil onto paper. The process is called mimeography, and a copy made by the process is a mimeograph.

Mimeographs, along with spirit duplicators and hectographs, were common technologies for printing small quantities of a document, as in office work, classroom materials, and church bulletins. For even smaller quantities, up to about five, a typist would use carbon paper. Early fanzines were printed by mimeograph because the machines and supplies were widely available and inexpensive. Beginning in the late 1960s and continuing into the 1970s, photocopying gradually displaced mimeographs, spirit duplicators, and hectographs.

A platen (or platten) is a platform with a variety of roles in printing or manufacturing. It can be a flat metal (or earlier, wooden) plate pressed against a medium (such as paper) to cause an impression in letterpress printing. Platen may also refer to a typewriter roller which friction-feeds paper into position below the typebars or print head. It can refer to the glass surface of a copier, and the rotating disk used to polish semiconductor wafers.

"The quick brown fox jumps over the lazy dog" is an English-language pangram – a sentence that contains all the letters of the alphabet. The phrase is commonly used for touch-typing practice, testing typewriters and computer keyboards, displaying examples of fonts, and other applications involving text where the use of all letters in the alphabet is desired.