Can I leave home without a phone? A coat and a pair of shoes still suffice for the walk itself. The question grows larger at the first destination: a ticket, a door code, a message about changed plans, a way to pay. I can leave a device on a table and still enter places arranged around the expectation that I carry it. The distance from my body to the computer has become a way of describing the distance from me to other people and the services they use.
There was a time when a receiver occupied a shared place. Sony's account of its 1955 transistor radio remembers a large earlier set around which a family gathered, then a portable model that could leave that room. The story is a manufacturer's recollection, and households listened in many ways. Still, the change of scale is tangible. A voice that had entered a place could follow one listener through it. The radio carried speech and music over distance, while the person holding it remained largely unknown to the broadcaster. A receiving antenna gave away no personal reply.
The first Walkman appeared in 1979, putting a cassette and lightweight headphones beside a moving person's ears. This was analogue sound, and portable radios had already brought listening outdoors. The headphones changed a further relation: several people could occupy the same pavement while only one heard that particular song. Sound had travelled closer to the body without giving its provider a continuous account of the listener. The listener could stop the tape, take off the headphones, lend the cassette, or leave it at home. Those acts were simple partly because the player did so little else.
A tidy history would place the implant at the far end of this procession. In 1958, however, Åke Senning implanted a pacemaker built by Rune Elmqvist in a human patient, more than twenty years before the Walkman. A device could already act inside a body while recorded music still came from a cassette. Bodily closeness, digitisation, and network connection have separate histories. A pacemaker's contact with tissue tells us something about its placement and function; it tells us little by itself about who can watch the person or interrupt their day.
The personal computer made other kinds of closeness possible from a desk. Reading, writing, editing a recording, and making a program could happen through the same keyboard and screen. Later the smartphone gathered the ticket office, bank, camera, workplace, library, and conversation into an object carried from bed to street. Post-Simulacrum Self-Service Without Contact follows the institutions that disappear behind that glass. Their disappearance changes the user's contact with the world in two directions. A service worker may be farther away than ever while the service can reach the person's hand, ear, and attention throughout the day.
Centimetres cannot measure all of that approach. A phone across the room can demand a response; a watch against the skin can remain quiet. A remote system may propose the next sentence before someone has worked out what they want to say. Physical placement, frequency of interruption, involvement in thought, and the cost of switching the system off each describe a different distance. Their combination matters more than any single picture of a chip entering flesh.
The body also meets a computer through ordinary light. In a controlled study, evening reading on a light-emitting device altered melatonin, circadian timing, sleep, and next-morning alertness compared with reading print. The tested exposure schedule, device, and comparison bound that finding. It nevertheless gives one precise meaning to a machine affecting biological time. The light reaches the eye; the effect can continue after the reading ends.
A sensor on skin enters another exchange. It may measure, store, display, or send a value, and those verbs do not entail one another. A continuous glucose monitor can estimate glucose levels through a sensor under the skin and send readings to a program. In an automated insulin-delivery system, the program can calculate a dose and direct a pump. For someone managing type 1 diabetes, this proximity can help keep glucose within a target range. The person still replaces sensors, checks equipment, enters meals, and handles failures. Intimacy here includes care, dependence, and maintenance in the same daily arrangement.
An implanted speech interface gives a more recent and narrower example of a computer meeting neural activity. In a 2023 study, researchers decoded attempted speech from one participant with paralysis into text. The participant's effort and training were part of the communication. This is a remarkable route for someone whose speech has been lost. It offers no warrant for treating another person's private thoughts as an open feed. The body's position in a technical system says too little about the person's agency until we ask what the system senses, what it can do, and who can change its terms.
There is a less visible closeness in delegated work. Someone who programs with another person may want the argument, the wrong turn, and the repair as much as a working result. A generated solution can spare an operation and also remove a passage they meant to take together. At work the person may have a deadline and welcome the saved hour; in an evening of curiosity the hour may have been the point. Neither use settles what tomorrow's colleagues will expect them to produce. The value of speed belongs to the activity in which the saved time lands.
Leaving a device at home tests another distance. The departure can end notifications on that device, yet a ticketing system still records fares and an office still maintains its files. In Helsinki, HSL offers a personal travel card that can be bought at a service point and topped up there; its own service point accepts cash. A traveller can therefore make the journey without a smartphone. The card belongs to a computerized fare system and its purchase requires identity documentation. The route solves one problem while leaving the institution's need for a record in place.
Official mail shows a different boundary. Since April 2026, Finnish authorities have primarily sent digital messages to adults who use public electronic services. People outside those services continue to receive paper mail. A person already using them can return to paper for 365 days; a later login after that period directs them toward electronic messages again. Paper remains available, while the ordinary digital route repeatedly asks the person to make the choice anew. The friction lies in the conditions of continuation.
Nor does putting away a phone end all recording. Another person's camera may process an image of someone who carries no device; the European Data Protection Board's guidance on video systems addresses that kind of processing. A camera can also record offline and deliver footage for later analysis. Receiving a radio signal is a different event. Being sensed, being recorded, being identified, and being made answerable to a record need separate evidence. Treating them as one constant condition would make it harder to tell where an actual intrusion begins.
The social cost of refusal is harder to put on a map. A friend chooses a group chat, a workplace chooses an account, a service chooses a card. Each choice has a local reason. Together they can make the person who declines a device spend more time arranging the same meeting, journey, or obligation. Antidigitism names the admission rule that forms when a machine-readable trace becomes the only accepted proof that someone took part. At the scale of one day, the test is quieter: can the alternative be used without losing the meeting or asking another person to carry every administrative task?
I can leave home without a phone. The route I take will still cross other people's computers, and some of those crossings may help me. What remains unsettled is how much of the route I must carry against my body, how much attention I must keep available for it, and whether the people at the next door can still meet me when the device is elsewhere.